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Nerves of the Upper Limb
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48
Anatomy
Undergraduate 1
02/25/2016

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Term
ventral and dorsal root
Definition
the spinal nerve is formed from the union of what two things?
Term
ventral root
Definition
this contains efferent or motor fibers (away from CNS)
Term
dorsal root
Definition
this contains afferent or sensory fibers (towards CNS)
Term
31
Definition
how many pairs of spinal nerves are there?
Term
8 cervical
12 thoracic
5 lumbar
5 sacral
1 coccygeal
Definition
what are the different regions of the 31 pairs of spinal nerves?
Term
vertebral canal (intervertebral foramina)
Definition
where does the spinal nerves exit the spinal canal?
Term
C1-C7
Definition
what spinal nerves will be found SUPERIOR to vertebrae for which they are named?
Term
C8 spinal nerve
Definition
what spinal nerve will exit the vertebral canal between C7 and T1?
Term
T1 and inferior spinal nerves
Definition
what spinal nerves are INFERIOR to vertebrae for which they are named?
Term
the posterior lateral postion (weak point in fibrocartilage on disc)
Definition
the spinal nerves are usually where on the intervertebral discs?
Term
herniation
Definition
when the nucleus pulposa pushes through annulus fibrosis
Term
T1-T12
Definition
all spinal nerves in the ventral rami will merge with one another to form nerve plexuses except for what 12 nerves?
Term
C1-C4
Definition
what spinal nerves are in the cervical plexus?
Term
C5-T1
Definition
what spinal nerves are in the brachial plexus?
Term
T12-L4
Definition
what spinal nerves are in the lumbar plexus?
Term
L4-S4
Definition
what spinal nerves are in the sacral plexus?
Term
T1-T12
Definition
these are the intercostal nerves
Term
Roots Trunks Divisions Cords Branches
Definition
what are the 5 parts of the brachial plexus?
Term
Roots Trunks Divisions Cords Branches
Definition
Risk Takers Don't Cautiously Behave
Term
roots
Definition
what combines to make up the trunk of the brachial plexus?
Term
C5 and C6
Definition
what 2 roots combine to form the superior trunk?
Term
C8 and T1
Definition
what 2 spinal nerves combine to form the inferior trunk?
Term
C7
Definition
what root makes up the middle trunk?
Term
1. superior trunk
2. middle trunk
3. inferior trunk
Definition
what are the 3 trunks of the brachial plexus?
Term
anterior and posterior
Definition
what are the 2 types of divisions in general in the brachial plexus?
Term
cords
Definition
divisions are combine to form what in the brachial plexus?
Term
axillary
Definition
the names of the cords are based on position by what artery?
Term
lateral cord
Definition
what cord is the anterior division of the superior trunk and middle trunk combined?
Term
posterior cord
Definition
this cord is the posterior division of the superior trunk and middle trunk and inferior trunk
Term
medial cord
Definition
this cord is a continuation of the anterior division of the inferior trunk
Term
2
Definition
each cord is going to divide into how many terminal branches?
Term
axillary nerve and radial nerve
Definition
the posterior cord is going to branch into what two nerves?
Term
medial cord
Definition
what cord does the ulnar nerve come from>
Term
lateral cord
Definition
what cord does the musculocutaneous nerve come from?
Term
lateral cord and medial cord
Definition
the median nerve comes from what two cords?
Term
1. axillary nerve
2. radial nerve
3. musculotaneous nerve
4. median nerve
5. ulnar nerve
Definition
what are the 5 terminal branches of the brachial plexus?
Term
axillary nerve
Definition
terminal branch of the posterior cord; innervates the deltoid and teres minor muscles
Term
axillary nerve
Definition
this nerve wraps around the surgical neck of the humerus
Term
radial nerve
Definition
continuation of the posterior cord; lies in the radial (spiral) groove; innervates all the posterior arm and forearm muscles
Term
musculotaneous nerve
Definition
continuation of the lateral cord; passes through coracobrachilis muscle; innervates the 3 anterior arm muscles
Term
median nerve
Definition
formed from a branch of the lateral and medial cords; innervates most (all but 1.5) of the anterior forearm muscles; in hand, it innervates 5 intrinsic muscles (3 thenar eminence muscles and lumbricals 1&2)
Term
ulnar nerve
Definition
continuation of the medial cord; only nerve to pass behind the elbow; innervates the flexor carpi ulnaris and ulnar 1/2 of the flexor digitorum profundus in the anterior forearm; innervates all intrinsic muscles of the hand except the 5 innervated by the median nerve
Term
ulnar nerve
Definition
this nerve is in between medial eppicondyle an olecranon process-->this is when you hit your funny bone
Term
long thoracic nerve
Definition
what nerve innervates the serratus anterior?
Term
thorcadorsal nerve
Definition
what nerve innervates the latissimus dorsi?
Term
C5, C6, C7
Definition
the long thoracic nerve branches off of what three roots of the brachial plexus?
Term
C6, C7, C8
Definition
the thoracodorsal nerve branches off of what 3 roots of the brachial plexus?
Term
ventral rami of spinal nerves C5 to T1
Definition
where is the brachial plexus derived from? and what spinal nerves consists of the brachial plexus?
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