5. Spinal Nerves Flashcards

1
Q

Arise along the spinal cord from the dorsal roots and ventral roots

A

Spinal nerves

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2
Q

All the spinal nerves contain axons of both sensory and somatic motor neurons called ?

A

Mixed nerves

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3
Q

Area of the skin applied w/ sensory innervation

A

Dermatome

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4
Q

3 major plexuses

A

Cervical plexus
Brachial plexus
Lumbosacral plexus

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5
Q

Supplies motor innervation to the muscles of the pelvic floor and sensory cutaneous innervation to the skin over the coccyx

A

Coccygeal plexus

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6
Q

Originates from spinal nerves C1 to C4

A

Cervical plexus

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7
Q

Important branches of cervical plexus

Innervates the diaphragm

A

Phrenic nerve

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8
Q

Originates from spinal nerves C5 to T1

A

Brachial plexus

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9
Q

Innervates two shoulder muscles and skin over part of the shoulder

A

Axillary nerve

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10
Q

Innervates all muscles in the posterior surface of the arm and forearm

A

Radial nerve

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11
Q

Top of the crutch can compress the radial nerve against the humerus. Compression can cause dysfunction of the radial nerve resulting in paralysis of the posterior arm and forearm muscles

A

Crutch paralysis

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12
Q

Innervates the anterior muscles of the arm and the skin over the radial surface of the forearm

A

Musculocutaneous nerve

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13
Q

Innervates two anterior forearm muscles and most of the intrinsic hand muscles

A

Ulnar nerve

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14
Q

Innervates most of the anterior forearm muscles and some of the intrinsic hand muscles

A

Median nerve

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15
Q

Originates from spinal nerves L1 to S4

A

Lumbosacral plexus

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16
Q

Innervates the muscles of the medial thigh and the skin over the same region

A

Obturator nerve

17
Q

Innervates the anterior thigh muscles and skin over the anterior thigh and medial side of the leg

A

Femoral nerve

18
Q

Innervates the posterior thigh muscles, anterior and posterior leg muscles ad most of the intrinsic foot muscles

A

Tibial nerve

19
Q

Innervates the muscles of the lateral thigh and leg and some intrinsic foot muscles

A

Common fibular nerve

20
Q

Tibial and common fibular nerves are bound together within a connective tissue sheath and together called ______

A

Sciatic nerve