assignment 3 - limb innervation Flashcards

1
Q

what are the 2 categories of the nervous system & what are they composed of?

A

central NS: brain & spinal cord
peripheral NS: cranial nerves & spinal nerves

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2
Q

What leave the left and right side of the spinal cord at regular intervals

A

spinal nerves

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3
Q

the spinal nerves supply _____ and _______ innervation to the muscles, skin, vessels, and joints of the limbs, neck, and body trunk

A

motor, sensory

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4
Q

A single spinal nerve consists of a combination of axons from 4 nerve types. What are they?

A

general somatic afferent
general somatic efferent
general visceral afferent
general visceral efferent

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5
Q

nerve axons conducting signals FROM skin, skeletal muscle, tendons, and joints; TO THE CNS (spinal cord)

A

general somatic afferent

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6
Q

nerve axons conducting signals FROM walls of tubular visceral organs, exocrine glands; TO THE CNS (spinal cord)

A

general visceral afferent

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7
Q

nerve axons conducting signals FROM CNS; TO voluntary striated muscle

A

general somatic efferent

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8
Q

nerve axons conducting signals FROM CNS; TO involuntary smooth muscle of organs and vessels, cardiac muscle

A

general visceral efferent

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9
Q

exits the dorsal aspect of the spinal cord

A

dorsal root

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10
Q

contains the AFFERENT nerves

A

dorsal root

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11
Q

exits the ventral aspect of the spinal cord

A

ventral root

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12
Q

contains the EFFERENT nerves

A

ventral root

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13
Q

The dorsal root and ventral root unite and form a mixed

A

spinal nerve

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14
Q

exits the vertebral column through the intervertebral foramen that exists between adjacent vertebrae

A

spinal nerve

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15
Q

The spinal nerve then splits into a ______ ______ that supplies structures dorsal to the transverse process of the vertebra and a _______ ______ that supplies structures ventral to the transverse process of the vertebra

A

dorsal branch, ventral branch

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16
Q

exits through the LATERAL VERTEBRAL FORAMEN of the ATLAS

A

cervical spinal nerve 1

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17
Q

The dorsal and ventral branches can “run with” adjacent dorsal and ventral branches, respectively

18
Q

a plexus of ventral branches that supply the muscles, vessels, nerves, structures, and skin of the thoracic limb

A

brachial plexus

19
Q

The BRACHIAL PLEXUS is formed primarily by ventral branches from spinal nerves

A

CS6, CS7, CS8, and TS1

20
Q

relating to or affecting the skin

21
Q

branches supplying sensory innervation from the skin to the CNS

A

cutaneous nerve (fibers)

22
Q

cutaneous nerve branches would primarily contain

A

general somatic afferent (axons)

23
Q

a superficial location supplied SOLELY by ONE cutaneous nerve (and one parent branch)

A

autonomous zone
- can help with diagnostics to test a parent nerve

24
Q

the brachiocephalic nerve innervates part of what muscle distal to the shoulder?

A

brachiocephalicus

25
the suprascapular nerve innervates the ____________ & _____________
supraspinatus infraspinatus
26
the subscapular nerve innervates the _____________ muscle
subscapularis
27
what does the axillary nerve innervate
subscapularis, teres major, teres minor, & deltoideus
28
what does the musculocutaneous nerve innervate?
biceps brachii & brachialis
29
Cutaneous branch of musculocutaneous nerve supports an autonomous zone in the craniomedial proximal 3/4ths of the antebrachium
medial cutaneous antebrachial nerve
30
what does the radial nerve innervate
triceps, anconeus, antebrachial extensors, & supinator
31
what does the radial nerve branch off into
deep branch of the radial nerve superficial branches of the radial nerve
32
supplies the supinator and antebrachial extensors
deep branch of the radial nerve
33
travel on either side of the cephalic vein in the cranial antebrachium and supply sensory innervation and support an autonomous zone on the cranial and lateral surface of the forearm and dorsal carpus, metacarpus, and digits
superficial branches of the radial nerve
34
what do the median & ulnar nerves innervate
pronator teres (median) & antebrachial flexors (median & ulnar)
35
what is the cranial & caudal division that the median ulnar common trunk splits into?
cranial = median nerve caudal = ulnar nerve
36
what two nerves have a connecting nerve ranch that can send sensory info from the paw to the CNS?
musculocutaneous nerve & median nerve
36
what do the pectoral nerves innervate
deep pectorals superficial pectoral
36
what does the long thoracic nerve innervate?
serratus ventralis
36
what does the thoracodorsal nerve innervate?
latissimus dorsi
36
cranial nerve ascends along the spinal cord into the cranial cavity, exits the cranial cavity, and emerges on the lateral aspect of the neck
accessory nerve
36
what does the accessory nerve innervate
omotransversarius, trapezius, & brachiochephalicus