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BIOL 537 - A&P Lab > PNS > Flashcards

PNS Flashcards

1
Q

Endoneurium

A

Connective Tissue

Surrounds individual axons

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2
Q

Perineurium

A

Connective Tissue

Surrounds axon groups to form fascicles

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3
Q

Epineurium

A

Connective Tissue

Surrounds entire nerve

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4
Q

Myelinated Axon

A

Insulation

Speeds up transmission

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5
Q

Unmyelinated Axon

A

Myelin still present, but not heavily wrapped

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6
Q

Fascicles

A

Axon bundles

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7
Q

Schwann Cell

A

Found in PNS

Myelinates axons

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8
Q

Cervical Plexus

A

C1-C4

Skin: superficial neck structures, skin of neck, posterior portion of head

Ansa Cervicalis

Phrenic Nerve (C3-C5) - Diaphragm

Lesser Occipital Nerve

Supraclavicular Nerves (C3-C4)

CN XII (Hypoglossal)

CN XI (Accessory)

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9
Q

CN XII (Hypoglossal)

A

Cranial Nerve (not from Cervical Plexus)

Innervates intrinsic/extrinsic tongue muscles

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10
Q

CN XI (Accessory)

A

Cranial Nerve (not from Cervical Plexus)

Innervation: Sternocleidomastoid + Trapezius

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11
Q

Lesser Occipital Nerve

A

C2

Goes up on back of skull

Innervation: skin on back of ear and scalp

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12
Q

Ansa Cervicalis

A

C1 - Superior Root

C2-C3 - Inferior Root

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13
Q

Supraclavicular Nerves

A

C3-C4

Innervation: skin above and below clavicle

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14
Q

Phrenic Nerve

A

C3-C5

Innervation: Diaphragm

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15
Q

Brachial Plexus

A

Roots: C5-T1

Trunks: Superior (C5-C6), Middle (C7), Inferior (C8-T1)

Divisions: Anterior, Posterior

Cords: Lateral, Medial, Posterior

Branches: Musculocutaneous, Axillary, Radial, Median, Ulnar, Long Thoracic

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16
Q
A
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17
Q

Musculocutaneous Nerve

A

C5-C7

Skin: lateral surface of forearm

Movements: shoulder, elbow, wrist

18
Q

Axillary Nerve

A

C6-C8

Skin: inferior lateral shoulder

Movements: laterally rotates arm (Teres Minor); abducts arm (Deltoid)

19
Q

Radial Nerve

A

C6-C8

Skin: posterior surface of forearm and arm, lateral 2/3 of dorsum of hand

Movements: elbow, wrist, thumb

20
Q

Median Nerve

A

C5-T1

Skin: lateral 2/3 palm, thumb, index, middle; lateral 1/2 ring and dorsal tips

Movements: hands, wrists, fingers, thumb

21
Q

Ulnar Nerve

A

C8-T1

Skin: medial 1/3 hand, pinky; medial 1/2 ring

Movements: wrist, fingers, hand

22
Q

Long Thoracic Nerve

A

C5-C7

Skin: medial arm and forearm

Movements: scapula and arm

23
Q

Intercostal Nerves

A

Intercostal Muscles

12 Pairs

25
Q

Lumbar Plexus

A

L1-L4

Femoral Nerve

Obturator Nerve

27
Q

Femoral Nerve

A

L2-L4

Skin: anterior/lateral thigh, medial leg/foot

Movements: hip/knee; iliopsoas, sartorius, quadriceps

28
Q

Obturator Nerve

A

L2-L4

Skin: superior medial side of thigh

Movements: adduction of thigh and knee

29
Q

Sacral Plexus

A

L4-L5, S1-S5

Superior Gluteal Nerves

Inferior Gluteal Nerves

Common Fibular Nerve

Tibial Nerve

Pudendal Nerve

Coccygeal Nerve

31
Q

Superior Gluteal Nerves

A

L4-L5, S1

Skin: suprapubic area; external genitalia; superior medial thigh; posterior thigh

32
Q

Inferior Gluteal Nerves

A

S1-S2

Skin: suprapubic area; external genitalia; superior medial thigh; posterior thigh

33
Q

Common Fibular (Peroneal) Nerve

A

L4-S2

Skin: lateral and anterior leg; dorsum of foot

Movements: lateral and anterior muscles of leg and foot

Branches: deep/superficial fibular nerves

34
Q

Tibial Nerve

A

L4-S3

Skin: none

Movements: hip, knee, foot, toes

Branches: medial and lateral plantar nerves; sural nerve

35
Q

Pudendal Nerve

A

S2-S4

Skin: suprapubic area; external genitalia; superior medial thigh; posterior thigh

36
Q

Coccygeal Nerve

A

S5

Skin: skin over coccyx

Movements: pelvic floor muscles

37
Q

Spinal Cord

A

Foramen Magnum to L2

Cervical (7 bones, 8 nerves)

Thoracic (12 bones, 12 nerves)

Lumbar (5 bones, 5 nerves)

Sacral (5 fused bones, 5 nerves)

Coccygeal (several fused bones, 1 nerve)

Cervical Enlargement (supplies upper limbs)

Lumbar Enlargement (supplies lower limbs

38
Q

End of Spinal Cord

A

Cauda Equina: origins of spinal nerves inferior to Conus Medullaris, in the Lumbosacral Plexus

Conus Medullaris: tapered inferior end (L2)

Filum Terminale: made of Pia Mater

39
Q

Dura Mater

A

Dense irregular connective tissue

Continuous with epineurium of spinal nerves

Epidural Space: between vertebrae and Dura Mater. Contains adipose tissue, loose areolar connective tissue, and blood vessels

40
Q

Arachnoid Mater

A

Loose areolar connective tissue

Subdural Space: between Dura and Arachnoid Mater; little serous fluid

41
Q

Pia Mater

A

Tightly bound to spinal cord

Forms Filum Terminale at inferior end (attached to coccyx)

Subarachnoid Space: between Arachnoid and Pia Mater. CSF found here (cushions spinal cord). Arachnoid granulations absorb CSF

BIOL 537 - A&P Lab (11 decks)

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