vision / somatosensation Flashcards
visual acuity
how clearly we see
visual processing
refers to accurate input and integration
guides motor output
two systems of visual processing
spatial, ambient: magnocellular
object, focus: parvocellur
spatial ambient vision
magnocellular
where am I, where is it
proactive
fast, subconscious
object, focal vision
parvocellular
what is it
reactive
slower, detailed, object ID
role of vision in movement
provides exertnal cues for verticality / motion detection
visual info better for __ movements, and __ contorl
slow
feedforward
feedforward control
proactive anticipatory
feedback control
reactive componsentory
APA
ability to predict upcoming obstacles
CPA
react to unanticipated dirsuptions
behaviour signs impaired vision in mobily
postural sway falls hesitancy to go out at night walks slowly hits things uses somatosensory / auditory cues to navigate obstacles
behaviour signs may present with UE use
inaccurate reaching
post traumatic vision syndrome
eyes drifting
double blurred vision
light sensitve
concentration difficulties
___ common in post traumatic vision syndrome
over focalization
over focalization
detail first
spatial awareness second
trouble releasing fixation
trouble switching from focal to spatial systems or using both together
Visual midline shift snydomre
after TBI or CVA
spatial visual process changes it orientation
both lateral and traverse midline affected
are both lateral and transereev midline effected in visual midline shift syndrome
yes
is VOMS a sideline assessment
no its screening tool for mTBI and concussion
intervention for impaired vision
maximize visual inputs
, somatosensation to compensate, vestibular input if balance impaired
CNIB referral
visual therapy
example if maximizing use of visual inputs
eye path for diplopia
gaze stability exercises
example of use of somatosensation to compensate
walking aid
somatosensation
collective term for touch temp body position pain vibration pressure
how is somatosensation recognized
mechanorecepotrs
thermoreception
proprioception
nociception
what does pain n temp tract
lateral spino thalmist
vibration and position sense from tract
dorsal
individuals with somatosensation impaired could have
hypersensitive hypo sensitivity numbness neuropathic pain complex regional pain dec prop, touch
somatosensation imparied at risk for
pressure sores and burns
somatosensation provides info on
body position in reference to supported surface
relationship body segs to one another
____ enabled by interaction of sensory and motor systems
stereogensis
how does somatosensation in postural control
orientated / posture
T/F somatosensation is necessary for skill acquisition
t
t/f the role of afferent input changes based on type of learning
true (i.e fast or slow, visually guided or not)
behaviours suggesting impaired somatosensation
balance spontaneous use of limb sensory ataxia can't sustain a contraction (grip_ can't learn new skills but can do old
assessment for somatosensation
light touch
temp
pain (sharp dull)
joint position sense
intervention for impaired somatosensation
educate on limb protection / skin care maximize cog / somatosensory input maximize vestibular input education on evneiorment adaptive equipment increase confidence
example convictive somatosensory input
imagery
mirror
how to maximize use of available somatosensation
LE balance minimize edema promote active movement promote changes in sensory stimule desensitize hyper sensitivity
how to maximize visual input
look at hand before reaching
look ahead to future foot placement
declutter
night light
how to maximize use of vestibular inputs
train balance with eyes closes
what might you educate your client on with impaired somatosensation
dark rooms
hot stoves
