Sensory antomy results Flashcards
Practical 2 results
pupillary reflex
bright light - pupil narrows
low light - pupil dilates
if shine light in right eye left pupil will also constrict (consensual reflex)
accommodation reflex
distant vision - pupil dilatates : lens flattens
close vision - pupil narrows : lens bulges
patellar reflex
tapping the tendon stretches the quad muscle causing it to involuntarily contract : knee extends
achilles reflex
tapping achiles tendon causes gastrocnemius to contract involuntarily : plantar flexion
reflexes and antagonistic muscles
forearm pressing on table : triceps contracts
forearm lifts table : biceps contracts
biceps and tricpes are antagonistic sp as one contracts the other relaxes
ciliospinal reflex
painful stimulus will cause the ipsilateral pupil to dilate allowing more light in to assess/detect danger
pupil on opposite side wont change
plantar reflex / babinski reflex
in infants babinksi is normal (big toe will flex inward - dorsiflexion)
they have a diff response to pain bc CNS is not fully developed
in adults painful stimulus should cause plantar flexion (toes flex downward)
Labryinthine reflex
semicurcular canals are stimukated by rotational movement
anterior : foward/baclward
posterior: head tilts to side
lateral : head spinning
post rotary nystagmus
eyes move in opposite direction of movement : spin right eyes will move left
slow phase - eyes move in same direction as movemeent
fast phase - eyes move in opposite direction of movement
rotary nystagmus
slow phase - eyes move in opposite directioin of movement
fast phase - eyes move in same direction as movement
past pointing
after rotation subject points past the examiners fingers in the direction of the spin
proprioceptors and spatial orientation
more difficult to perform exercises w eyes close : increased body sway and inbalance
w/out visual cues brain finds it much harder to determine bodys position
two point sensibility
face and fingers are most sensitve bc they have the smallest receptive field
adaptation to touch
over time lose sensation of coins each time
weber test
no hearing loss : sound heard equally in both ears
conduction deafness : sound louder for ear w hearing loss bc they cant hear environmental noise
nerve deafness : vibration louder for normal ear bc the defecttive never is not processing sound in weak ear
