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Human Anatomy Exam 3 > Chap 16 > Flashcards

Chap 16 Flashcards

1
Q

Spinal cord ends…

A

approx. L1 vertebrae

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2
Q

Number of vertebrae/ section

A

8 cervical, 12 thoracic, 5 lumbar, 5 sacral, 1 coccygeal

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3
Q

spinal cord meninges

A

vertebra, epidural space, dura mater, arachnoid mater subarachnoid space, pia mater

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4
Q

anterior horn

A

motor neurons

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5
Q

lateral horns

A

t1-L2 autonomic motor

sympathetic motor neurons

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6
Q

posterior horns

A

sensory neurons

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7
Q

conus medullaris

A

cone shaped, tapering at end of the spinal cord (L1)

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8
Q

cauda equina

A

“horse tail” axons of spinal nerves projecting inferiorly from spinal cord to lumbar and sacral levels

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9
Q

filum terminale

A

strand of pia mater extending from the conus medullaris (white)

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10
Q

cervical enlargement:

A

neurons ot upper limbs

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11
Q

lumbsacral enlargement

A

nuerons to lower limbs

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12
Q

anterior median fissure

A

motor

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13
Q

posterior median sulcus

A

sensory

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14
Q

anterior rootlets

A

cmbine to form anterior root which contains anterior motor axons only

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15
Q

posterior rootlets

A

combine to form posterior root and contain only sensory axons.

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16
Q

Dermatome:

A

a segment of skin supplied by a single spinal nerve
C3 collar
T4 nipple
T10 belly button

17
Q

Nerve plexuses

A

Cervical Brachial Lumbar Sacral

18
Q

cervical plexuse

A

innervates anterior neck muscles and diaphragm

19
Q

brachial plexuse

A

innervates pectoral girdles and upper limbs

20
Q

lumbar plexuse

A

innervates pelvic girdles, thighs

21
Q

sacral plexuse

A

innervates lower extremities

22
Q

Reflexes

A

rapid, automatic, involuntary reactions of muscles or glands to a stimulus

23
Q

Ipsilateral reflex

A

both receptor and effector organs on same side of spinal cord

24
Q

Contraloateral reflex

A

sensory receptors and effector organs on opposite body side.

25
Q

Monosynaptic reflex

A

simplest reflex ex: patellar reflex

26
Q

polysynaptic reflex

A

involves a number of synpases and interneurons (ex. Pain withdrawal)

Human Anatomy Exam 3 (4 decks)

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