Brachial Plexus Flashcards
What type of innervation does the brachial plexus supply
motor sensory and sympathetic
what type of nerves make up brachial plexus
ventral rami of spinal nerves C5-T1
What are the names for the structural components of the brachial plexus
Rami(roots), Trunks, Divisions, Cords, Branches
What are the roots that supply brachial plexus
C5-T1 as exit respective intervertebral foramina in neck and upper thorax
What are the trunks of the brachial plexus
Upper Middle and Lower
What makes the upper trunk
C5 and C6
What makes the middle trunk
continuation of C7
What makes the lower trunk
C8 and T1
What do the anterior divisions of the brachial plexus contribute to
lateral and medial cords
what do the posterior divisions of the brachial plexus contribute to
extensions of all three trunks. forms posterior cord
What is the first portion of brachial plexus in the axilla region
the cords
What are the cords named for
relation to the axillary artery
What forms the lateral cord
union of 2 anterior divisions from upper trunk and from middle trunk C567
What forms the medial cord
direct continuation of the anterior portion of the lower trunkC8T1
What forms the posterior cord
union of 3 posterior divisions. all spinal nerve roots participate. C5-T1
What branches come off lateral cord
lateral pectoral nerve
contributary to median nerve
musculocutaneous nerve
What levels does musculocutaneus nerve contain
C567
What branches come off medial cord
medial pectoral n medial brachial cutaneous nerve medial antebrachial cutaneous nerve contributary to median nerve ulnar nerve
What spinal nerves supply ulnar nerve
C8T1
What branches off posterior cord
upper subscapular nerve, thoracodorsal nerve, lower sub scapular nerve, axillary nerve, radial nerve
what innervates subscapularis
upper subscapular nerve
what innervates lat dorsi
thoracodorsal nerve, known also as middle subscapular nerve
what innervates subscapularis and trees major
lower subscapular nerve
What does axillary nerve innervate. what cord levels does in contain
deltoid and teres minor C5 C6
What are the two terminal branches of posterior cord
axillary nerve and radial nerve
What does the radial n innervate
all muscles of the dorsal surface of the upper limb
what does the median nerve innervate and what cord levels does it contain
central antebrachial mm and thenar m of hand. C5 inconsistently and C6-T1
What are the terminal branches of brachial plexus
Musculocutaneous Ulnar Axillary Radial Median
What are the supraclavicular branches from brachial plexusq
dorsal scap
suprascap
nerve to subclavius
long thoracic nerve
What levels does suprascap n have
C5 and C6
What levels does nerve to subclavius contain
C5 and C6
What ventral rami are contained in long thoracic nerve
C5 C6 C7
T/F each ventral rams that participates in formation of brachial plexus receives gray rami communicans
true
What is the dermatomal innervation of upper limb
C4-T3
What innervates the dermatomes of shoulder
C4 from cervical plexus
What innervates the anterior medial and posteromedial portion of upper arm
intercostobrachial cutaneous nerves T1 T2 and sometimes T3
