PNS: EX2 (spinal nerves / branchial plexus)

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The mixed spinal nerves are formed by the union of _________ & __________.

ventral & dorsal spinal roots

T/F The sacral spinal nerves emerge through intervertebral foramina.

FALSE

T/F The ventral root of the sacral spinal cord contains the axon of neuron in the anterior & lateral grey columns.

True: parasympathetic

Name the nerves, which emerge from the posterolateral sulcus of the spinal cord.

dorsal root

T/F The ganglia of the sacral spinal cord are located in the intervertebral foramina.

False: located in vertebral canal

T/F In the upper cervical region, the spinal cord levels are almost identical to the vertebral level.

True: in C1 & C2, C3 - C8: oblique & the oblique length increases as you proceed down the vertebral levels.

T/F The spinal nerves are mixed nerve w/sensory & motor fibers.

TRUE

T/F The recurrent meningeal branches of the spinal nerves are branched after the dorsal & ventral rami are divided.

False: the spinal nerve gives off the recurrent meningeal branches of the spinal nerve & then divides immediately into a dorsal & a ventral ramus

A grey ramus communicates or joins to the ______ of each spinal nerve.

meningeal branches (aka recurrent meningeal nerves of the spinal nerve or sinu-vertebral nerves)

The ventral rami of the thoracic & the 1st & 2nd lumbar nerve contribute ___________ to the corresponding sympathetic ganglion & receive ___________.

a white ramus communicans, 1 or more grey ramus communication

T/F The S2, S3 & S4 receive grey rami communicantes from the corresponding sympathetic ganglion.

False: they belong to parasympathetic nerves

The borders of an intervertebral foramen are A. anteriorly; B. posteriorly; C. superiorly; D. inferiorly

anteriorly: IVD & adjacent part of vertebral bodies; posteriorly: synovial zygophophyseal joints; superiorly & inferiorly: vertebral notches of the pedicles of the adjoining vertebra

Name the structure, which are located w/in the intervertebral foramina.

mixed spinal nerve, spinal artery, plexus spinal vein & meningeal spinal nerve

Name the type of neurons in the anterior grey column of the spinal cord.

preganglionic efferent

Name the type of the nerve cell in the spinal ganglia.

unipolar

Name the segments of the spinal cord which contain the preganglionic efferent fibers of the sympathetic nerve.

T1-T12 & L1-L2 / L3

T/F The meningeal nerves receive one or more communications from neighboring white ramus communicantes from a thoracic & upper lumbar sympatthetic ganglion.

false: grey, not white

Name all the possible targets, which are innervated by the meningeal nerve of the spinal nerve.

dura mater, wal of bv, periosteum, ligaments & IVD

The upper 3 cervical meningeal nerves are distributed to the cerebral dura mater of the ____________ cranial fossa.

posterior

Name 2 fxnal nerve fibers, which pass through the ventral root @ the T5 spinal cord.

1. sympathetic fiber, 2. preganglionic visceral efferent

T/F The meningeal branches of the spinal nerves are present @ vertebral levels.

TRUE

Name 2 ligaments, which the meningeal nerve of the spinal nerve supplies j@ the L1 spinal cord.

posterior longitudinal ligament, ligamentum flavum

Name the nerves, which are distributed to the cerebral dura mater of the posterior cranial fossa.

upper 3 cervical meningeal nerves

T/F The C1 dorsal ramus divides into a medial & a lateral branches...

false: C2 - C8

T/F The C2 dorsal ramus wind around the articular process.

false: all cervical dorsal ramus except C1 & C2

T/F The C1 dorsal ramus is smaller than the ventral ramus.

false: C1 dorsal ramus is larger than C1 ventral ramus

Name 4 muscles, which are innervated by the C1 dorsal ramus.

ractus major & minor, superior & inferior oblique capitis & semispinalis capitis

Name the nerve which emerges under the vertebral artery.

C1 emerges b/w vertebral A & posterior arch of C1

Name the 2 nerves, which supply the inferior oblique muscle.

Dorsal ramus C1 (suboccipital ), dorsal ramus C2 (greater occipital )

The medial branch of the C2 dorsal ramus is also know as __________.

greater occipital nerve

Name 3 nerves, which pierce the semispinalis capitis & trapezius to supply the skin of the occipital scalp.

medial branch of dorsal ramus of C2 (greater occipital n, medial branches of dorsal rami of C4 & C5

Name the nerves, which innervates the semispinalis cervicis & multifidus.

medial branches of dorsal rami of C4 & C5

Name the nerve, which innervates the levator costarum.

lower 6 medial branches of the thoracic dorsal rami

aka: dorsal ramus C1

suboccipital n

aka: dorsal ramus C2 (medial branch)

greater occipital nerve

aka: dorsal ramus C3

least occipital n

aka: ventral ramus C2

lesser occipital N

aka: ventral rami C2 & C3

great auricular nerve

Name 2 nerves that form the inferior trunk of the brachial plexus.

C8& T1

Name the nerves that receive the gray rami communicantes from the middle cervical ganglion of the sympathetic trunk.

C5 & C6

T/F The 8 cervical ventral ramus contributes the white ramus communicantes to the cervicothoracic ganglion.

false: T1

T/F The supraclavicular branches are from the roots & trunks of the branchial plexus.

TRUE

The longus collies are innervated by ___________.

c5-c8

The nerve to the phrenic nerve from the 5th cervical ventral ramus joins the phrenic nerve @ the front of _____________ muscle.

scalenus anterior

The suprascapular nerve arises from _________ of the brachial plexus.

c5&c6 trunk

T/F The suprascapular nerve enters the supraspinous fossa through the scapular notch above the superior transverse scapular ligament.

false: inferior

.The lateral cord of the brachial plexus is formed by _______ division of ________,

anterior, c5-c7

Name the nerve which distributes the deep medial surface of the pectoralis major.

lateral pectoral nerve

Name the nerve which distributes the deep medial surface of the pectoralis major.

posterior, c5&c6

Name the nerve which innervates the teres major.

lower subscapular n c5,c6

Name the border of the quadrangular space through where the axillary nerve passes. A. superiorly; B. infferiorly; C. medially; D. laterally

superiorly: subscapularis; inferiorly: teres major; medially: long head of traiceps brachialii; laterally: surgical neck of humerus

Name the nerve which gives off the upper lateral cutaneous nerve of the arm.

axillary nerve gives posterior branch

Name the nerve which peirces the coracobrachialis.

musculocutaneous

The lateral cutaneous nerve of the forearm is continuation of _________ nerve.

musculocutaneous

Name the nerve which supplies the skin over the half of the anterior surface of the forearm.

musculocutaneous

The intercostobrachial nerve communicates w/ _____________ on the arm.

medial cutaneous of arm

Name the nerve which arises from 2 cords of the brachial plexus.

median n

Name the nerve which locates b/w 2 tendons of the flexor digitorum superficialis & the flexor carpi radialis @ the proximal to the flexor retinaculum.

median n

Name the nerve which innervates the flexor pollicis longus. ___________ of ___________

anterior interossious of median N (c8-t1)

Name the nerves which give off the articular nerve to the elbow joint.

musculocutaneous, radial & ulnar

The proximal radio-ulnar joint is innervated by ___________ nerve.

median n

Name the nerve which innervates the lateral 3-1/2 digits of the palmar surface.

common palmar digital branch of median n

The ulnar nerve arises from __________ cord w/ __________ roots.

medial, (c7), c8, t1

Name the nerve which les in a groove on the dorsum of the medial epicondyle.

ulnar n

The ulnar nerve lays medial/lateral side of the ulnar vessels @ the proximal end of the flexors retinaculum.

medial

Name the nerve which innervates the palmaris brevis. _________ of ____________

dorsal branch of ulnar

Name the nerve which supplies the adductor pollicis. __________ of ___________

deep terminal branches of ulnar

The deep terminal branch of the ulnar nerve supplies following muscles, EXCEPT A. abductor digiti minimi; B. opponent digiti minimi; C. adductor pollicis; D. opponent pollicis

D: opponent pollicis (median nerve

The radial nerve arises from the f________ cord/cords w/__________ roots.

posterior, c5-c8, t1

The muscular branches of the radial nerve innervates following muscles, EXCEPT A. long head of the biceps brachii; B. medial head of teh triceps; C. anconeus; D. extensor carpi radialis brevis

A: musculocutaneous

The posterior interosseous nerve innervates the following fmuscles, EXCEPT A. extensor digitorum; B. extensor carpi ulnaris; C. abductor pollicis brevis; D. extensor indicus

C. abductor pollicis brevis:median

Clutch paralysis can be caused by the injury of _____________ nerve/nerves.

radial / ulnar n

Winging the scappular is caused by the paralysis of the __________ nerve of ____________.

long thoracic n, c5-c7

Each of the thoracic ventral rami connects to the adjacent sympathetic ganglion thru the (grey/white) rami communicantes.

grey

The grey ramus communicant joins to the ventral rami of the spinal nerve (proximal/distal) to the exit of the white ramus communicant.

proximal

Name the thoracic ventral rami which are distributed to the thoracic wall only.

T3-T6 ventral rami

Name the nerve which supplies the axillary skin.

lateral cutaneous branch T1 ventral rami

Name the nerve which supplies the abdominal skin in the upper part of the infrasternal angle.

anterior branch of lateral cutaneous branch T7-t12 ventral ramus

Name the muscles which are innervated by 1 - 6 thoracic ventral rami

intercostalis, serratus posterior superior, transversus thoracis

Name the nerves which supply the skin over the scapular & latissimus dorsi

Posterior branches of lateral cutaneous branch t1-t6 ventral ramus

Name the nerve which supplies the skin around the umbilicus

ventral ramus T10

Name the nerves which innervate the serratus posterior inferior.

ventral rami t9-t11

Name the nerve which passes behind the lateral arcuate ligament.

ventral ramus t12 (subcostal n)

Name the nerve which supplies the pyramidalis.

iliohypogastric

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