Final Exam: Reflexes Flashcards
(34 cards)
What does a reflex consist of?
Afferent n. Spinal cord segment, efferent n, and motor unit
T/F Reflexes do not require cerebral input
T
T/F Responses do not require cerebral input
F
T/F a response is and involuntary behavior
F, voluntary
T/F the frontal lobe initiates reflexive actions
F. responsive
When you pinch the fifth digit, which nerve is Afferent?
Ulnar
When you pinch the fifth digit, which spinal cord segment is affected?
C6-T2
When you pinch the fifth digit, which spinal cord is efferent
musculocutaneous
median
ulnar
Nerves of the thoracic limb comes from which spinal cord segment?
C6-T2
Nerves of the pelvic limb come from which spinal cord segment?
L4-S3
T/F a Reflex can occur without a response
T
What is another name for spinal reflexes?
reflex arc
T/F. Spinal reflexes have an afferent (sensory) and an efferent (motor) component
T
What would an monosynaptic spinal reflex be?
one afferent n to one efferent n.
What would a polysynaptic reflex arc look like?
will have interneuron
associated with.
sone afferent to many efferent
What are UMNs?
Cell bodies are in the brain and terminal axon at the SC
What are LMNs?
cell bodies in the SC, Axons terminate at target organ
What do UMNs synapse with?
LMNs
What do LMNs synapse with?
Target m. or gland
Which MN regulates reflexes, and sends signals from the brain?
UMNs
What is the afferent and efferent n. in PLR?
A: 2
E: 3
What is the Afferent and efferent in Corneal reflex?
A: Ophthalmic br. of 5
E: 7, 6,
What is the Afferent and efferent n. in Palpebral Reflex?
A: maxillary br. of 5 and ophthalmic br. of 5
E: 7
What is Afferent and efferent n. in menance resp.?
A:2
E: 7
