Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
23 Cards in this Set
- Front
- Back
|
What plays a key role in posture, locomotion, and manipulating objects?
|
vision
|
|
|
Name two photoreceptors
|
Rods- night, rim
cones- day center |
|
|
Where does the retinal pathway end?
|
occipital lobe area 17, 18, 19
|
|
|
What is the amount of world you can see at any one time without moving your head or eyes?
|
visual field
|
|
|
at what part does the visual pathway become the optic tract
|
chiasm
|
|
|
Which system stabalizes your eyes, coordinates motor response, maintains postural stability? (equilibrium)
|
Vestibular system
|
|
|
What is the term used to define abnormal eye movement when the head is rotated?
|
Nystagmus
|
|
|
Where are the sensory receptors for the vestibular system?
|
inner ear
|
|
|
What are the sensory receptors in the inner ear?
|
Labronth filled sacs filled with fluid called endolymph
1 utricle and 1 saccule (static;straight head) 3 semicircular planes; angular- rotation/up down/side to side |
|
|
Explain the pathway of the vestibular system
|
Stimulis starts in the inner ear to the vestibular ganglion
8th cranial nerve->pons->medulla->thalamus->cortex->muscles of the head->cranial nerve III (occulomotor) |
|
|
Which labyrinth pick up senses regarding eye control?
|
semicircular canals- Dynamic
|
|
|
Which labyrinth pick up senses regarding the position of the head in space?
|
utricle and saccule
|
|
|
Are broadmanns areas 4&6 information processing centers for motor or sensory?
|
motor
|
|
|
Peripheral receptors through the thalamus, association cortex, sensory cortex, cerebellum and basil ganglia all send info to what area for motor cortex planning?
|
Area 6 premotor planning
Area 4 for motor planning |
|
|
What tract is for motor cortex output?
|
CORTICOSPINAL
|
|
|
Describe the motor cortex pathway
|
50%from area 4, and 50% from 6/3,1,2
down the internal capsule, (basil ganglia), medulla where 90% cross over, continues down to the lateral column,and then enters the ventral horn where it synapses with LMN, then leaves the ventral horn, exits spinal cord through the ventral root, spinal nerve, to periphreal nerve to muscle. |
|
|
What area of the motor cortex is involved in learning something new?
|
area 6, premotor cortex
|
|
|
What part of the brain is involved in parallel processing?
|
Cerebellum
|
|
|
Where does the cerebellum send info?
|
Cortex and brainstem
|
|
|
What part of the brain controls equilibrium, modulates ms tone, error detector, timing and coordination
|
cerebellum
|
|
|
What are the symptoms of cerebellar dys?
|
Ataxia, wide base gait
Nystagmus Overshooting Intention tremor NO paralysis |
|
|
What nervous system disorder is associated with basil ganglia disorder?
|
Parkinsons-
Dopamine depletion in BG Inhibition or reduction in movement Dyskineasia Akinesia Bradykineasia Resting tremor |
|
|
What are symptoms associated with Basil Ganglia dysfunction?
|
Dyskinsea- involuntary movements
Bradykineasia Resting tremor Increased ms tone (ridgidity) |
