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CNS > Test 2 #3 > Flashcards

Test 2 #3 Flashcards

1
Q

how many neurons participate in a stretch reflex such as a knee jerk?

A

2

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2
Q

What cortical layer contains BETZ cells?

A

Inner pyramidal

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3
Q

Alpha motor neurons innervate

A

Extrafusal fibers

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4
Q

gamma motor neurons innervate

A

intrafusal fibers

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5
Q

Afferent fibers are always sensory t/f?

A

False

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6
Q

t/f corticospinal fibers are association type fibers?

A

true

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7
Q

strip of skin innervated by single spinal nerve

A

dermatome

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8
Q

muscle spindles are

A

stretch receptors

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9
Q

Nuclear bag fibers receive _____ and _____ fibers

A

IA primary afferent, Group II afferent

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10
Q

the corticospinal tract descends in the _____ limb of the internal casual and is originated in the _____ cortex within the percentile gyrus

A

posterior, motor

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11
Q

in the spinal cord the ventral root is ______ in function

A

motor

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12
Q

compared to large muscles in the thigh, finger muscles require

A

greater neuronal involvement

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13
Q

first order tract of proprioception from the lower limb is the ______ tract

A

fasciculus gracilis

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14
Q

the unconscious proprioceptive fibers of the fasciculus cuneus terminates in the ______ nucleus

A

accessory cuneate

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15
Q

loss of _____ would result from a lesion of the cortical spinal tract?

A

Ipsilateral voluntary motor control

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16
Q

the _______ tract is concerned with intersegmental spinal reflexes

A

fasciculus proper

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17
Q

gives rise the lateral corticospinal tract

A

pyramidal decussation

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18
Q

which of the following tracts decussates in the midbrain

A

ventral spinocerebellar

19
Q

which of the following tract move the head in maintaining equilibrium and center of gravity

A

vestibulospinal

20
Q

lateral entry zone of the dorsal root contains______ fibers

A

proprioceptive

21
Q

the anterior entry zone of the dorsal root contains _____ fibers

A

fine touch

22
Q

when trying to get glass of water, hand trembles more and more as it get closer to the glass. This describes a problem where?

A

lesion in the cerebellum

23
Q

Sensory structures in the medulla are _____ to the sulcus limitans

A

lateral

24
Q

Sensory structures in the spinal chord are

A

dorsal

25
Q

anterio cortico spinal tract crosses the midline of the ______

A

spinal cord

26
Q

the posterior spinocerebellar tract originates from the neurons located ______

A

(VII) nucleus of clarke

27
Q

reticular formation

A

goes everywhere and does everything

28
Q

at what level does the pathway for pain and temperature sensation for the lower limbs cross the midline?

A

lumbosacral spinal cord

29
Q

untrue of VPL nucleus

A

project to the cingulate gyrus

30
Q

spinal cord segments ____ form the cervical enlargement

A

C5-T1

31
Q

greatest diameter of the lumbar enlargement is at___ level

A

T12

32
Q

Dorsal nucleus of Clarke is located in what lamina?

A

VII

33
Q

pain and temperature is sent via

A

Spinothalamic

34
Q

mossy cell fibers are primarily ______ in function

A

excitatory

35
Q

Spinocerebellum (paleocerebellum) controls ____ type movements

A

gross

36
Q

Pontocerebellum (neocoerebellum) controls ____ type of movement

A

fine

37
Q

blood drains out of the cranium through the _____ vein

A

internal jugular vein

38
Q

middle cerebral artery runs with the _______

A

lateral sulcus

39
Q

What supplies the visual cortex?

A

posterior cerebral artery

40
Q

which drains deep?

A

Great vein of Galen

41
Q

What crosses the corpus callous?

A

anterior cerebral artery

42
Q

what drains the internal structures of the brain?

A

Great cerebral vein of Galen

43
Q

drains the brain

A

Internal jugular vein

44
Q

what artery supplies blood to the interior part of the temporal lobe?

A

Posterior cerebral artery

CNS (15 decks)

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