General Terminology And SC Morphology Flashcards Preview

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Flashcards in General Terminology And SC Morphology Deck (65)
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1

Forebrain is composed of what two structures

Cerebral hemispheres and diencephalon

2

Collections of cell bodies with a common function

Nucleus

3

Layers of gray matter over other parts of the CNS

Cortex

4

Tapering inferior end of the spinal cord: ________

Group of axons that project from the spinal cord inferior to the above structure: _______

Thin strand of pia mater that helps to anchor the conus medullaris to the coccyx: ________

Conus medullaris

Cauda equine

Filum terminal

5

Horn that consists of interneurons who’s processes remain within the spinal cord and projection neurons whose axons collect into ascending sensory pathways

Posterior horn

6

Distinctive region of gray matter that caps the posterior horn

Substantia gelatinosa

7

Part of posterior horn that consists of interneurons and projection neurons that transmit somatic and visceral sensory information

Body of the posterior horn

8

Substantia gelatinosa appears pale because it primarily deals with what kind of fibers

Finely myelinated/unmyelinated sensory fibers that carry pain and temperature information

9

White matter located between the substantia gelatinosa and the surface of the cord

Lissauer’s tract

10

Lower motor neurons are contained in which horn

Anterior horn

11

Autonomic nerves are contained within what area of the spinal cord

Intermediate gray matter

12

Preganglionic sympathetic neurons lie in what segments

T1-L3 primarily in the interomedial smell column

13

Sacral parasympathetics lie in what spinal cord levels

S2-S4 but do not form a distinct horn

14

Collection of large cells located on the medial surface off the posterior horn (T1-L2) that play a prominent role in sensory processing and typically treated as part of the posterior horn

Clark’s nucleus - posterior thoracic nucleus

15

Lamina that is a thin layer of gray matter covering the substantia gelatinosa

Layer 1

16

The substantia gelatinosa is what lamina. Level

Level II

17

Body of the posterior horn are what lamina level

III - VI

18

Lamina level that corresponds to the intermediate gray matter (including Clarke’s nucleus) but also includes extensions into anterior horn

Lamina VII

19

Lamina that comprises some of the interneurons zones of the anterior horn

Lamina VIII

20

Lamina that consists of clusters of motor neurons embedded in the anterior horn

Lamina IX

21

Lamina that is thae zone of gray matter surrounding the central canal

Lamina X

22

Nucleus that modulates the transmission of pain and temperature information
Found at all levels in lamina II

Substantia gelatinosa

23

Sensory processing nucleus found in all levels at Lamina III-VI

Body of posterior horn

24

Posterior spinocerebellar tract cells found at T1-L2 in the VIII lamina nucleus

Clarke’s nucleus

25

Bundle of axon fibers in the posterior column-medial lemniscus pathway of SC that carries sensory information from the arms

Fasciculus cuneatus

26

Bundle of axons fibers in the posterior column-dial lemniscus pathway of SC that carries sensory information from the middle thoracic and lower limbs of the body

Fasciculus gracilis

27

Sensory axons enter the spinal cord on what side

Dorsal root ganglion

28

Motor axons emerge the spinal cord from what side

Anterior horn

29

White matter contains what 3 direction of axons

Long descending
Long ascending
Local axons interconnecting different spinal levels

30

Gray matter contains what things

Motor neuron cell bodies
Endings of incoming sensory axons
Second order sensory cell bodies (axons entering ascending tracts to relay sensory information. To brainstem and forebrain)
Endings of long descending tracts and local interneurons