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Plexi of the body- brachial plexus
plexi of the body- brachial plexus
75
Anatomy
Graduate
11/11/2010

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Term
What is the brachial plexus?
Definition
large networks of nerves to UE extending from neck into axilla.
Term
What is the order of the subdivision of the brachial plexus?
Definition
rami or roots, trunks, divisions, cords and their branches (nerves)
Term
the brachial plexus is fromed by union of ventral rami of what nerves?
Definition
C5-8 and greater part of T1
Term
the brachial plexus lies between which 2 ms?
Definition
anterior and medial scalene
Term
What is the typical plan of the brachial plexus?
Definition
ventral ramus, trunk, division, cord, branches
Term
what spinal nerves contribute to the suprerior trunk of the brachial plexus?
Definition
C5 C6
Term
What contributes to the inferior trunk of the brachial plexus?
Definition
C8 and T1
Term
t or f : each trunk contributes to the anterior and posterior divisions.
Definition
true
Term
what is formed by contributions from the anterior divisions of the superior and midle trunks of the brachial plexus?
Definition
lateral cord
Term
what is formed by the contributions from the anterior division of the inferior trunk?
Definition
medial cord
Term
what is formed by contributions from the posterior divisions of the superior, midle and inferior trunks?
Definition
posterior cord
Term
What cord of the brachial plexus is lateral to axillary artery, inferior to coracoid process and medial to tendon of coracobrachialis?
Definition
lateral cord
Term
what cord of the brachial plexus is medial to axillary artery, somewhat parallels the coracoid process and is anterior to upper part of the serratus anterior muscle?
Definition
medial cord
Term
what cod of the brachial plexus is posterior to axillary artery, anterior to upper part of serratus anterior muscle, and parallels long thoracic nerve?
Definition
posterior cord
Term
What branches off the posterior cord?
Definition
axiallary and radial
Term
the lateral cord gives off to what branches?
Definition
musculocutaneous and median . it is the lateral root of the median nerve.
Term
what three nerve branches are arranged like a capital M?
Definition
musculocutaneous median and ulnar
Term
The supraclavicular part is located in which part of the neck?
Definition
posterior
Term
the four branches of the supraclavicular part are???
Definition
dorsal scapular nerve, long thoracic nerve, nerve to subclavius, suprascapular nerve
Term
the dorsal scapular nerve come from what spinal nerves?
Definition
C4-5
Term
long thoracic nerve comes from what spinal nerves?
Definition
C5-7
Term
the nerve to subclavius comes from what spinal nerves?
Definition
C4-6
Term
the suprascapular nerve comes from what spinal nerves?
Definition
C5-6
Term
the dorsal scapular nerve innervates what mmuscles?
Definition
levator scapulae, rhomboids
Term
the long thoracic nerve innervates what muscle?
Definition
serratus anterior
Term
the nerve to subclavius innervates what msucle and what joint?
Definition
subclavius and sc joint
Term
the suprascapular nerve innervates what muscles and what joint?
Definition
supraspinatus nad infraspinatus mm and shoulder joint
Term
what muscle does the dorsal scapular pierce and runs deep to what other muscle, which it helps to supply?
Definition
scalenus medius,... deep to levator scapula
Term
the dorsal scapular enters what muscles which is supplies?
Definition
the rhomboids
Term
the suprascapular passes across what triangle of the neck? and superior to what plexus?
Definition
posterior triangle and superior to brachial plexus
Term
does the suprascapular nerve pass throught the scapular notch?
Definition
yes
Term
what two muscles and joint does the suprascapular supply?
Definition
supraspinatus, infraspinatus and shoulder joint
Term
what nerve passes the posterior aspect of superior trunk? (C5 and 6) (C4?)
Definition
suprascapular
Term
what nerves passes the poserior aspect of the ventral ramus of C5 (C4?)
Definition
dorsal scapular
Term
What nerve passes the posterior aspect of ventral rami of C5-7
Definition
long thoracic
Term
what nerve passes throught the apex of axilla posterior to other componenents of the brachial plexus?
Definition
long thoracic
Term
the long thoracic supplies what muscle?
Definition
serratus anterior
Term
roots from C5-6 of the long thoracic peirces what muscle
Definition
scalenus medius
Term
Roots of C7 of the long thoracic nerve pass anterior to what muscle?
Definition
scalenus medius ms.
Term
what nerve passes the anterior aspect of the superior trunk from chiefly C5 (C4 and 6??)
Definition
nerve to subclavius
Term
what nerve descends posterior to clavicle and anterior to brachial plexus?
Definition
nerve to subclavius
Term
what nerve supplies the subcalvius muscle and SC joint?
Definition
nerve to subclavius
Term
what are the three branches of the lateral cord?
Definition
lateral pectoral nerve (C5-7), musculocutaneous (C5-7) and lateral root of median nerve (C6-7)
Term
What nerve from the lateral cord pierces the clavipectoral fascia?
Definition
lateral pectoral nerve
Term
what does the lateral pectoral nerve supply?
Definition
pectoralis major muscle and via medial pectoral nerve to pectoralis minor muscle.
Term
musculocutaneous nerve is one of the terminal branches of the lateral cord...T/F?
Definition
T
Term
the musculocutaneous nerve innervates whats part of the arm?
Definition
anterior aspect
Term
the musculocutaneous nerve enters deep surface of what muscle?
Definition
coracobrachialis muscle
Term
what nerve is proximal to elbow, pierces deep fascia and becomes superficial. Now called lateral antebrachial nutaneous nerve and supplies skin on the lateral aspect of forearm.
Definition
musculocutaneous nerve
Term
the lateral root of median nerve is the one of the branches of the lateral cord.T/F?
Definition
T
Term
what nerve root does the lateral root of median nerve join to form median nerve lateral to axillary artery
Definition
medial root
Term
the lateral root of the median nerve supplies what muscles?
Definition
flexor muscles in forearm, except FCU, and skin on hand
Term
What are the five branches of the medial cord?
Definition
medial pectoral n (8-T1), Medial brachial cutaneous n(C8-T1), Medial antebrachial cutaneous n (C8-T1), Ulnar n (C8-T1; C7), Medial root of median n (C8-T1)
Term
The medial pectoral nerve supplies which muscles?
Definition
pectoralis major and minor
Term
the medial brachial cutaneous nerve supplies what area of the body?
Definition
skin over medial surface of the arm and proximal part of forearm
Term
the medial antebrachial cutaneous nerve runs between what artery and vein?
Definition
axillary artery and vein
Term
What part of the body does the medial antebrachial cutaneous nerve supply?
Definition
skin of medial surface of forearm
Term
what does the ulnar nerve supply?
Definition
1 and 1/2 in forearm, most small muscle in the hand and some skin
Term
the ulnar nerve innervates what muscles?
Definition
FCU, FDP, palmaris brevin, hypothenar muscles, lubricals to digits 4 and 5, all interossei, and adductor pollicis.
Term
what does the medial root of the median nerve innervate?
Definition
flexor muscles in forearm, except FCU, and skin on the hand.
Term
what are the branches of the posterior cord?
Definition
upper scapular n (C5-6), thoracodorsal n (C6-8), lower subscapular n (C5-6), Axillary n (C4-7), Radial nerve (C5-8 and T1)
Term
upper subscapular nerve supplies what muscle?
Definition
subscapularis
Term
the thoracodorsal nerve arises between what 2 nerves?
Definition
the upper and lower subscapular nerve
Term
what muscle does the thoracodorsal nerve innervate?
Definition
latissimus dorsi
Term
what nerve passes inferolateral, deep to subscapular artery and vein?
Definition
lower subscapular nerve
Term
the lower subscapular nerve supplies what muscles
Definition
subscapularis and teres major muscles
Term
is an axillary nerve a terminal branch?
Definition
hell yeah
Term
what nerve passes the posterior aspect of arm through quadrangular (quadrilateral) space with posterior circumflex humeral vessels.
Definition
axillary nerve
Term
what nerve winds around the surgical neck of the humerus?
Definition
axillary nerve
Term
what nerve innervates the teres minor and deltoid muscles, and shoulder joint??
Definition
axillary nerve
Term
what nerve ends as upper lateral brachial cutaneous nerve which supplies skin over inferior half of deltoid and adjacent areas of arm
Definition
axillary nerve
Term
is the radial nerve a terminal branch?
Definition
yes
Term
what nerves leaves the axilla and runs posterior inferior and lateral between the long and medial heads of the triceps muscles
Definition
radial nerve
Term
what nerve enters the radial groove in the humerus?
Definition
radial
Term
what muscles does the radial nerve innervate?
Definition
triceps, anconeous, brachioradialis, extensor muscles of forearm and skin of extensor region, including hand
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