I have been studying the effect of eye movements in neurological patient groups since year 2000. I was very excited to read Andoret van Wyk’s article. This article described my experiences exactly. Poor ocular movement’s results in inattention as well as head tilt and poor spatial awareness.
The Author reports that 70% of stroke patients are affected by eye movement disorder. These include:
The following are some of the difficulties I have seen in my stroke patients:
The perception difficulties are also a big issue. For example in a room with many pieces of furniture they have difficulty navigating around or between the furniture. They have difficulty judging if their cup is full as they have no depth perception. There are difficulties in drawing a complete picture or realising some part of the picture is missing.
There are difficulties in copying or matching pictures. In this case you can predict that there would be difficulties in their daily life; as they are not able to organise their body in space.
What we look at, the images that we see, are interpreted by the brain. Interpretation of visual input is vitally important for aligning and maintaining the body in space which is fundamental to the successful movements in everyday life.
Vestibular system is also affected. Stroke patients have reduced vestibular ocular reflex. This is inability to use the ocular muscles that move the eye horizontally or vertically which is vital in gait.
As mentioned before because of poor ocular motor skills head is shifted to one side so that they cannot get better images which in turn hugely impacts on their ability to transfer weight from left to right and right to left. It affects the visual space and the visual loss can cause inattention.
“Visio motor deficits and visual perceptions impairment as a result of eye movement’s disorder may affect an induvial ability to respond to sensory inputs from the environment, the task results in change in the posture control that leads to increase functional dependence.”
In the first instance the assessment is crucial.
@Birkdale neuro rehab centre we have developed many ways to combine eye movements in our work with our neurological patients.
“Across – section survey and cross sectional clinical trial to determine the prevalence and management of eye movements disorder and vestibular in post stroke patient.”
By Andoret van Wyk htp;/frontiersin.org/people/u/357823