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Anatomy 2320/2325 > Spinal Cord/Nerves > Flashcards

Spinal Cord/Nerves Flashcards

1
Q

How long is the spinal cord?

A

Roughly 16-18 Inches

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2
Q

What shape is the spinal cord?

A

Cylindrical

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3
Q

What are the two longitudinal depressions of the spinal cord?

A

Posterior and anterior median

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4
Q

What is the tapering end of the spinal cord called?

A

Conus Medullaris

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5
Q

How many pairs of spinal nerves are there

A

31 that contain both sensory and motor axons

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6
Q

What is the connective tissue found within the spinal cord?

A

Endoneurium- around an axon
Perineurium- around a fascicle
Epineurium- around the whole nerve

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7
Q

What are the four plexuses?

A

Cervical, brachial, lumbar, and sacral

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8
Q

Phrenic Nerve

A

Innervates diaphragm through thoracic cavity

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9
Q

Long Thoracic

A

Innervates serratus anterior

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10
Q

Medial Pectoral

A

Innervates pectoralis major AND minor

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11
Q

Lateral Pectoral

A

Innervates pectoralis major

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12
Q

Axillary

A

Innervates deltoid and teres minor

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13
Q

Radial

A

Innervates all muscles of posterior brachium, posterior antebrachium, and brachioradialis

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14
Q

Median

A

Innervates all muscles of antebrachium except the medial half of flexor digitorum profundus and flexor carpi ulnaris

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15
Q

Musculotanelis

A

Innervates all muscles in anterior brachium except brachioradialis

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16
Q

Ulnar

A

Innervates medial half of flexor digitorum profundus and flexor carpi ulnaris

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17
Q

Femoral

A

Innervates iliopsoas group, anterior thigh, and pectineus

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18
Q

Obturator

A

Innervates all muscles in medial thigh except pectineus

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19
Q

Superior Glutteal

A

Innervates gluteal group except gluteus maximus

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20
Q

Inferior gluteal

A

Innervates Gluteus Maximus

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21
Q

Sciatic Nerve

A

Innervates nothing (branches off into tibial nerve and common fibular nerve)

22
Q

Tibial Nerve

A

Innervates all posterior thigh except biceps femoris short head and posterior leg

23
Q

Common fibular

A

Innervates biceps femoris short head (branches into deep and superficial nerve)

24
Q

Deep fibular

A

Innervates anterior leg

25
Q

Superficial fibular

A

Innervates lateral leg

26
Q

Pendundle nerve

A

Innervates perineum, external anal sphincter, and external urethral sphincter

27
Q

What are the group of axons that project from the conus meduallris?

A

Cauda equina

28
Q

What is the thin strand of pia mater that travels in the cauda equina that anchors the conus medularis to the coccyx

A

Filum Terminale

29
Q

What enlargement accommodates extra nerves for upper appendages?

A

Cervical Enlargement

30
Q

What enlargement accommodates extra nerves for lower appendages?

A

Lumbar englargement

31
Q

What are the three meninges that cover the spinal cord?

A

Dura Mater, arachnoid mater, and pia mater (in order)

32
Q

What space is between the dura mater and the bony vertebrae?

A

Epidural space

33
Q

What are the two true spaces in the spinal cord

A

Epidural and subarachnoid

34
Q

What is the potential space in the spinal cord?

A

Subdural Space

35
Q

Which space is between the dura mater and the periosteum

A

Epidural Space

36
Q

Which mater fuses with the connective layers that surround the spinal nerves

A

Dura Mater

37
Q

Which mater adheres to the spinal cord?

A

Pia Mater

38
Q

What are the triangular extensions that anchor the spinal cord to the dura mater

A

Denticulate Ligaments

39
Q

What are the collections of spinal tracts in the white mater

A

Funiculi

40
Q

What joins the two anterior funiculi

A

White commissure

41
Q

What joins the two sides?

A

Grey commissure

42
Q

What houses the somas of somatic motor neurons?

A

Anterior Horns

43
Q

What contains the somas of automatic motor neurons from T12-L2?

A

Lateral Horns

44
Q

What contains the axons for sensory and interneurons?

A

Posterior Horns

45
Q

What is a continuation of the fourth ventricle?

A

Central Canal

46
Q

What innervates the deeps muscles and skin of the back?

A

Posterior Rami

47
Q

What innervates the anterior and lateral portions of the trunk and upper/lower appendages?

A

Anterior Ramus

48
Q

What forms the intercostal nerves?

A

T1-11 anterior rami

49
Q

What forms the subcostal nerve?

A

T12 anterior rami

50
Q

Which is the only anterior rami involved in a plexus?

A

T1

51
Q

What are the three components of a reflex?

A
  1. Receptor in PNS
  2. Communicates with the CNS
  3. Action occurs in a peripheral effector

Anatomy 2320/2325 (9 decks)

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