For this newsletter I have chosen
visual disturbances as the subject. I have found that it is extremely
common for people to report improvements in vision immediately
following a chiropractic adjustment, and there have also been some
remarkable recoveries of loss of vision. I personally had visual
disturbances which recovered following chiropractic intervention and
even today if I have an upper cervical adjustment I can discern even
the smallest improvements in visual acuity.
Some of the research papers I refer to
in this newsletter are not specifically related to chiropractic;
however what you will see again is the common thread of ‘cervical’
involvement in visual dysfunction.
The theories put forward by the various
authors include irritation of the cervical sympathetic chain in the
neck, incorrect proprioceptive feedback to the brain, irritation of the
nerves affecting the vertebral and carotid arteries resulting in a
reduced blood flow to the brain, referred to as hypoperfusion. One
thing is certain, when you head is not on straight, interference could
result to the various structures neurological and vasculature in the
neck which could have the affect of diminishing visual functions.
Researcher Dr. Allan Terrett[1] has observed in reference to chiropractic that “Many of the anecdotal claims that at first appear fanciful are being validated.”[2]
The claims are no longer just anecdotal and certainly in my view have
never been fanciful. These claims and positive results are appearing in
chiropractic offices daily, in well constructed case studies and in
scientific studies. The powerful healing powers of a well delivered
upper cervical adjustment can no longer be ignored and can no longer
remain hidden from us patients.
I hope you enjoy my newsletters and as always feel free to provide me with any feedback and suggestions to info@upcspine.com.
Remember I am a patient and not a medical practitioner; however I am
entitled to my own opinion. People are free to disagree with me. My
newsletters are provided as an informational source only, and are not a
medical opinion. Therefore you should do further research for yourself
and make your own decisions.
Condition Report
n a hunt for papers which discuss the
correlation of changes in vision following chiropractic or
spinal manipulative therapy you will find articles written
by chiropractors, osteopaths, ophthalmologists and
medical specialists. You will find papers in various chiropractic
journals, the journal of Manipulative and Physiological
Therapeutics, the journal of Chinese Medicine, optometry
journals an so on. The point is that there are a diverse
range of people who are smart enough to have recognized
the obvious link between vision problems and the cervical
spine.
Stephens and Gorman[3] discuss the case study of two girls aged 13, one with “headaches, blurred vision, motion sickness and peripheral pains and aches”. She had “concentric narrowing of the visual fields” and her “suboccipital joints were tender to palpation.” The other patient “complained
of headaches, dizziness, blurred vision and peripheral
pains and aches but no motion sickness”. She
also had sub-occipital pain and decreased range of motion
of the cervical spine. The authors indicate that treatment
was by chiropractic manipulation of the cervical,
thoracic and lumbar spines, so it wouldn’t be classed as
‘specific’ chiropractic, however, improvements in vision
were immediate after spinal manipulation.
A further case by Gorman et al[4] is a
single case of a patient with reduced visual field and
retinal damage due to congenital glaucoma. The patient had
her left eye removed at age 3 and glaucoma progression
resulted in marked loss of vision in her remaining eye such that
at age 16 she was “declared legally blind”. The patient apparently sought chiropractic care because of “long-term back pain, neck pain, headache, and frequent classic migraine.”
I find in my research that in many cases people seek out
chiropractic care for those conditions for which
chiropractic treatment is pigeon-holed e.g. back pain.
They are amazed to discover that when they are treated
other symptoms and deficits seem to improve. This frequently occurs
when upper cervical spine dysfunction is addressed. Previous
chiropractic intervention to the lumbar and thoracic spine
had not resulted in any visual field change. Confirmation
of the patient’s visual field deficit was confirmed by
ophthalmic examination. “Total area of vision …. was assessed as 2% of a normal field.” She indicated that her perception of vision was “shadows only.”
Chiropractic manipulation using diversified technique was
applied (low amplitude, high velocity) with “joint cavitation sound.” Immediately after the first chiropractic treatment the patient reported that she “can now see a hand, not just a shadow”.
Ophthalmic examination revealed visual field increase from
2% to 11%. Following the 2nd chiropractic session the
field increased further. Many months after her treatment
he visual field has increased to 20% and been maintained.
Her headaches, migraines, neck and back pain responded
well with migraines ceasing completely. In the discussion session
of the paper there is a familiar theme, that is, “cervical
pathology may irritate the sympathetic nerve fibres
(vertebral nerve), which accompany the vertebral arteries
which may lead to constriction of the vertebral-basilar
arterial system.” The paper mentions a study by Bogduk [5] et al stimulating the cervical sympathetics resulting “in pronounced decrease in carotid artery flow (30% of control group)” and further said stimulation has been shown to “reduce blood supply to the retina in human subjects.”
The treatment in this case was a good outcome for this
patient, but one has to wonder if she could have achieved
normal eyesight and not lost her left eye had she had the
benefit of chiropractic evaluation and treatment very
early on in her life.
Charlotte Leboeuf-Yde at al [6]
initiated a study to investigate the frequency of
different non-musculoskeletal symptoms reported by
patients who had sought chiropractic care for musculoskeletal
conditions e.g. back pain, sciatica etc. There have been reports
throughout the literature and anecdotally that according to
the authors “spectacular ‘cures’ have been reported, based solely on clinical observations.”
462 separate reactions were recorded by about 23% of the
patients and these fell into the following categories;
respiratory system “easier to breathe”; digestive system “improved function” and eyes/vision “clearer, sharper, better vision”, followed by circulatory system “improved circulation”; Urinary tract “easier to urinate”; hearing “less tinnitus, better hearing”;
followed by other improvements. It is not clear from the
paper what vertebrae were adjusted/manipulated or how the
manipulation was achieved (what technique). In the 8 cases
who reported improvements in hearing it is stated that
the thoracic spine, in combination with some other spinal
region was adjusted. The authors cite the Harvey Lillard
experience and indicate that D.D. Palmer had adjusted the 4th thoracic
vertebra or Lillard resulting in resumption of hearing. In
fact my research shows this, adjustment to T4, to be
incorrect, as according to the Chiropractic Green Books,
Palmer actually adjusted axis (C2)
In yet another paper involving Gorman
[7] a woman reported loss of vision in her left eye
following a fracture of the left zygomatic arch. The left
eye had reduced light perception and both optic nerves
were diminished. Following chiropractic treatment over several sessions
a significant improvement occurred in vision immediately
following spinal manipulations.
Stephens and Gorman [8] in a paper
discuss a patient who presented with neck pain, and a
history of incidents of acute spastic torticollis.
Examination revealed limited flexion, extension and rotation of
the cervical spine and a slight scoliosis. The c-spine was
adjusted by hand with a lateral thrust; each thoracic
segment was adjusted and some “torsional lumbar manipulations” were performed. The graphs in this case study indicate “immediate
improvement in visual field sensitivities and a decrease
in defect levels measured after spinal
adjustment.” The authors call for more research
into how spinal manipulation can improve vision in so called ‘normal’
vision patients presenting with back pain. Bring on the
research!
Stephens and Gorman in yet another paper
[9] focus on visual deficit concerned with the narrowing
of visual fields. They cite numerous studies which
suggest a link between recoveries of vision following
spinal manipulation. One of the hypotheses as to the cause of the
vision loss they suggest is cerebral hypoperfusion (deficient
or reduced blood flow) which “has been confirmed to be part of upper spinal derangement”.
In this case the patient presented with ongoing minor
headaches which resulted in a more severe headache. The
visual field results following the spinal manipulative
therapy (SMT) revealed immediate full visual fields. In other words,
the patient’s vision improved significantly. According to
the authors “the patient was able to read the last line of the visual acuity chart.”
A telephone follow up with the patient some 3 months later
showed she no longer had headaches and her mother
remarked on improvements in learning, sport and attitude. The authors
conclude that SMT should be considered in the treatment of
symptoms as a result of head trauma and whiplash and
suggest that chiropractors utilize the various ophthalmic
tests and equipment available to check for visual field
loss before and after the application of SMT.
Gorman [10] presents a case of a
62-year-old male with presumptive optic nerve ischemia, who
presented with a one week history of monocular visual
defect, headaches and neck strain. Vision improved dramatically
following spinal manipulation as measured using static perimetry.
The author’s conclusion is that cervical spine derangement
produces microvascular spasm in the cerebral vasculature,
including that of the eye.
Gorman [11] again discusses a case of a
9 year-old with demonstrated spinal injuries which may
have caused cortical and ocular vision loss which was
ameliorated following spinal a manipulation under
anaesthesia. Two separate incidents of head trauma and vision loss
are discussed which resolved following spinal manipulation.
Gorman refers to studies which discuss ‘cervical syndrome’
and personal experience with 6,000 manipulations under
anaesthetic to support his theories that “spinal
manipulation, by repositioning vertebrae, defuses the
irritative focus, leading to relaxation of the
cerebral vasculature.” Because the carotid artery supplies
microcirculation to the optic nerve, he believes
manipulation can affect this circulation by freeing up
irritation to the arteries and restoring ‘normal’ flow.
Two chiropractors Kessinger and Boneva
[12] carried out a study involving 67 subjects, which
investigated the relationship between upper cervical
‘specific’ chiropractic care and changes in visual acuity.
Results indicated statistically significant improvement in
visual acuity in both right and left eyes. They noted that “considerable
evidence attests an association between visual disorders
and head/cervical neck trauma” although the
body of study is not great with reported cases being only
case reports or small studies. According to the authors it
is also “not unreasonable
to assume that ischemic changes in vasculature associated with the
sympathetic and parasympathetic innervation, or
pressure to the eyes per se could elicit changes in
vision.” Of the 67 subjects in this case, 59
had a demonstrated C1 listing (subluxation) and the other 8
had a C2 listing.
Gorman [13] published a case of a
patient who developed a scotoma in vision in the right eye.
The scotoma resolved after spinal manipulation. The
author found significant recovery in vision occurring with each
spinal manipulation treatment. This case reinforces SMT as the
recovery event, as Gorman discusses the reoccurrence of the
scotoma on three separate occasions and on each case
following SMT, vision returned to normal. According to the
author this case suggests “SMT
can affect blood supply of localized brain tissue and
microvascular abnormality of the brain is caused by spinal
derangement.” Interestingly Gorman cites a
study by Otte which found that 6 of 7 patients with
non-traumatic cervical pain had “parieto-occipital hypoperfusion” and “in
24 patients confirmed by independent observers to be
suffering from cognitive disturbances after whiplash ALL
had parieto-occipital hypoperfusion compared to control
subjects.” Parieto-occipital hypoperfusion
basically means reduced flow of blood to the cerebral
cortex in the brain. For us laypersons it means the blood flow to
part of your brain was not normal.
There are some other interesting studies
worth following up as follows. A summary of a few of these can be
found in Kirk Eriksen’s book [14] .
Zhang et al [15] in this study
provides information regarding improvement of visual
disturbance in 83% of 111 cases treated over a period of
seven years, including 9 cases out of 12 blind eyes which regained
vision. The authors indicate a finding of a correlation
between poor posture of the cervical spine and head and
visual disturbances.
Briggs and Boone [16] show a
relationship between upper cervical chiropractic
adjustments and changes in nervous system response,
sympathetic and parasympathetic.
Schutte et al [17] a study of 12
children with Esophoria, which is a muscle co-ordination
problem in which an eye or eyes have a tendency to turn
inward. The findings suggest that esophoria may respond to
chiropractic cervical adjustment.
Terrett and Gorman [18] report a news
article about a 4 year-old girl, blind since age 9 months
who recovers sight after adjustment of the first cervical
vertebra (C1-atlas) and discuss research with rabbits in
which removal of superior cervical ganglion in the neck
resulted in a disappearance of fluorescent fibers of the iris. In
other words the sympathetic nerve fibers affecting the iris
originate in the nerve ganglion in the neck! Thus visual
disturbances may well be caused by irritation of the
cervical sympathetic chain in the neck which may be
corrected by cervical chiropractic adjustment to restore
correct vertebral relationships.
Further information about the role of
neck proprioception in visual competence can be gleaned
from a study by Dichgans [19] et al in which they find
that “compensatory eye
movement is critically influenced by vestibular and neck afferents
and is not initiated centrally” in the
brain. The study discusses removal of labyrinth
(labyrinthectomy) and neck input (rhizotomy) or both and finds a
replacement compensatory mechanism between the two and not a
central compensation. The authors state “these
findings extend our previous conclusion that for the
range of movements we tested, ocular
stabilization is entirely achieved by afferents from the labyrinth
and neck proprioceptors.” Following
labyrinthectomy a recovery of ocular stabilization returned
to 90% post 1-month and this is attributed to “an increase in gain of the neck-to-eye loop”
and notably the tests were done in the dark so there was
no visual feedback to the monkey during the test. This
paper seems to lend weight to the argument that neck
dysfunction can affect vision. The plasticity of the
central nervous system is demonstrated in this case.
I also came across a study by Brown [20]
in which it is suggested that accommodative disturbance
has been cited as one of the causes of visual disturbance
following whiplash injury. A whiplash group consisted of
19 subjects and the control group consisted of 43 subjects.
The amplitude of accommodation of the right and left eyes of the
whiplash and control group subjects was measured and the
results of the two groups compared. The results indicate
that whiplash was associated with defective visual
accommodation in the present whiplash subjects.
Murphy [21] indicates that it is
reasonable to conclude that the posture control system is
affected in whiplash subjects due to misleading
information from the cervical (neck) proprioceptors. This causes
vertigo, disturbed eye movements and reading problems.
Ernst, Seidl and Todt [22] conclude “manual medicine should be an integrated part of modern clinical otolaryngology” and “joint disorders” in the c-spine are “characterized by a variety of symptoms” (e.g. headache, vertigo, dizziness, blurred vision)”.
Suggested Further Reading
- Abraham M, Sakhuja N, Sinha S, Rastogi S.; Unilateral visual loss after cervical spine surgery; J Neurosurg Anesthesiol. 2003 Oct;15(4):319-22
- Wong CW, Chen TY, Liao JJ, You DL; Serial regional blood flow and visual evoked responses in transient cortical blindness; Acta Neurochir (Wien). 1993;120(3-4):187-9
- Awan KJ; Association of ocular, cervical, and cardiac malformations; Ann Ophthalmol. 1977 Aug;9(8):1001-11
- Srinivasan K, Rajan N, Ramamurthi B; Craniovertebral anomaly with visual field defect; J Assoc Physicians India. 1970 Aug;18(8):697-8
- Rohmer F, Brini A, Mengus M; Regression of visual disorders after reduction of a cervical spine dislocation; Rev Otoneuroophtalmol. 1954;26(1):31-4
References
[2] The eye, the cervical spine, and spinal manipulative therapy: a review of the literature; Allan G.J. Terrett and R. Frank Gorman; Chiropractic Technique, Vol. 7, No. 2, May 1995
[3] Stephens D; Gorman F; Bilton D; The
Step Phenomenon in the Recovery of Vision with Spinal
Manipulation: A Report on Two 13-Yr-Olds
Treated Together. Journal of Manipulative and Physiological Therapeutics; Volume 20, No9, 628-33; (November/December 1997)
[4] Benjamin R. Wingfield, BAppSc(Chiro), R. Frank Gorman, MBBS. DO, FRACO; Treatment
of Severe Glaucomatous Visual Field Deficit by
Chiropractic Spinal Manipulative Therapy. A Prospective Case
Study and Discussion. Journal of Manipulative and Physiological Therapeutics; Volume 23, No6, 428-34; (Jul/Aug 2000)
[5] Bogduk N, Lambert G, Duckworth JW; The Anatomy and Physiology of the Vertebral Nerve in Relation to Cervical Migraine; Cephaalgia 1981; 1:1-14
[6] Charlotte
Leboeuf-Yde, DC, PhD, Iben Axén, DC, Gregers Ahlefeldt,
DC, Per Lidefelt, DC, Annika Rosenbaum, BAppSc (Chiro),
and Thomas Thumherr, DC ; The Types and Frequencies of
improved Nonmuskuloskeletal Symptoms Reported After
Chiropractic Spinal Manipulative Therapy. Journal of Manipulative and Physiological Therapeutics (JMPT); Volume 22, No9, 559-64; (Nov/Dec 1999)
[7] Danny Stephens, DC, DO, Henry Pollard, Don Bilton, DC, Peter Thomson, DC, DO and Frank Gorman, DO;
Bilateral Simultaneous Optic Nerve Dysfunction After
Pariorbital Trauma: Recovery of Vision in Association with
Chiropractic Spinal Manipulation Therapy. Journal of
Manipulative and Physiological Therapeutics (JMPT); Volume 22,
No9, 615-21; (Nov/Dec 1999)
[8] Danny Stephens, D.C., M.Chiro.Sc., R. Frank Gorman, M.B.B.S., D.O. Does ‘Normal’ Vision Improve with Spinal Manipulation? Journal of Manipulative and Physiological Therapeutics (JMPT); Volume 19, No6, 415-18; (Jul/Aug 1996)
[9] Danny Stephens, D.C., R. Frank Gorman, M.B.B.S., D.O. The
Association between Visual Incompetence and Spinal
derangement: An Instructive Case Study; Journal of Manipulative and Physiological Therapeutics (JMPT); Volume 20, No5, 343-50; (June 1997)
[10] R. Frank Gorman, M.B.B.S., D.O. The Treatment of Presumptive Optic Nerve Ischemia by Spinal Manipulation;
Journal of Manipulative and Physiological Therapeutics
(JMPT); Volume 18, No3, 172-77; (Mar/Apr 1995)
[11] R. Frank Gorman, M.B.B.S., D.O. Monocular Vision Loss After Closed Head Trauma: Resolution Associated with Spinal Manipulation; Journal of Manipulative and Physiological Therapeutics (JMPT); Volume 18, No5, 308-14; (June 1995)
[12] Robert Kessinger, D.C.; Dessy Boneva, D.C. Changes
in visual Acuity in Patients Receiving Upper Cervical
Specific Chiropractic Care; Journal of Vertebral Subluxation Research (JVSR); 2(1), Jan 1998
[13] R. Frank Gorman, M.B.B.S., D.O. Monocular Scotomata and Spinal Manipulation: the Step Phenomenon; Journal of Manipulative and Physiological Therapeutics (JMPT); Volume 19, No5, 344-49; (June 1996)
[14] Eriksen, Kirk Upper Cervical Subluxation Complex: A Review of the Chiropractic and Medical Literature. , pp339-344. Publisher: Lippincott Williams & Wilkins 2004 http://www.LWW.com.
[15] Zhang CJ, Wang Y, Lu WQ, Li YM, Shen ZX, Li JX, Liu XC, Zhou SD, Gao JS; Study on Cervical Visual Disturbance and its Manipulative Treatment; Journal of Traditional Chinese Medicine, 1984 Sep; 4(3):205-10
[16] Briggs L, Boone WR; Effects
of a chiropractic adjustment on changes in pupillary
diameter: a model for evaluating somatovisceral
Response; Journal Manipulative Physiol Ther. 1988 Jun;11(3):181-9
[17] Schutte BL, Teese HM, Jamison JR; Chiropractic adjustments and Esophoria: A Retrospective Study and Theoretical Discussion; Journal Australian Chiropractic Association, 1989;19(4):126-128
[18] Terrett AGJ, R. Frank Gorman;The Eye, the Cervical Spine, and Spinal Manipulative Therapy: A Review of the Literature.; Chiropractic Technique, 1995;7(2):43-54
[19] J. Dichgans, E. Bizzi, P. Morasso, V. Tagliasco;The Role of Vestibular and Neck Afferents During Eye-Head Coordination in the Monkey.; Brain Research, 71 (1974) 225-232
[20] Shayne Brown; Effect of whiplash injury on accommodation; Clinical & Experimental Ophthalmology 31(5) 424 - Oct 2003
[22] A. Ernst, R.O. Seidl, I Todt;Mode-of-action of manual medicine in the cervical spine; HNO 2003 51:759-770 July 2003
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