lecture 9 Flashcards
Anterior Roots:
Originate from the ______of the cord
anterior aspect
Anterior Roots: Carry _____ only
motor information
Anterior Roots: No associated ____
ganglion
Posterior Roots Originate from the_____ of the cord
posterior aspect
Posterior Roots Carry ______only
sensory information
Posterior Roots Have an _____
associated ganglion
The anterior and posterior roots come together to form ____
spinal nerves
Spinal nerves contain _____
both sensory (arriving) and motor (exiting) information
Spinal nerves travel through ______, bilateral openings within the vertebrae
intervertebral foramina (IVFs)
Spinal nerves then split just distal to the IVF into: ______ and ______
Anterior Primary Rami: Posterior Primary Rami:
Anterior Primary Rami branch____
anteriorly
Anterior Primary Rami Innervate _____
muscles and structures of the upper and lower limbs via plexuses
Posterior Primary Rami: Branch ____
posteriorly
Posterior Primary Rami: Innervate ____
deep muscles of the back
Posterior Primary Rami: Also innervate ____
skin of the dorsal (posterior) surface of the trunk
Brachial Plexus Formed by ______
anterior primary rami of nerve roots C5-T1
Brachial Plexus From proximal to distal, the brachial plexus can be divided into:
Roots Rugby
Trunks Teams
Divisions Drink
Cords Cold
Branches Beer
Brachial Plexus Roots of _____ unite to form the superior trunk
C5 & C6
Brachial Plexus Roots of __ continue as the middle trunk
C7
Brachial Plexus Roots of _____ unite to form the inferior trunk
C8 and T1
C5 -T1 make up the ____
brachial plexus
The posterior division of all three trunks unite to form the _____
posterior cord
The anterior division of the superior and middle trunks unite to form the _____
lateral cord
The anterior division of the inferior trunk continues as the _____
medial cord
spinal nerve c8 comes out between ___ and ___
c7 and t1 vertebrae
The cords sit ___ _____ and ____ to the artery
medial, lateral and posterior
The cords and most of their branches lie within the axilla (deep to _____
pec minor)
Five Terminal Branches
Musculocutaneous Nerve
Axillary Nerve
Radial Nerve
Median Nerve
Ulnar Nerve
MARMU (lateral to medial)
Musculocutaneous Nerve
Axillary Nerve
Radial Nerve
Median Nerve
Ulnar Nerve
Dorsal scapular nerve _____ and ___
(C4), C5
Dorsal scapular nerve (C4), C5 Innervates _______ and _____
levator scapulae, rhomboids
Long thoracic nerve ___ ____
C5,6,7
Phrenic nerve ____ ___
C3,4,5
C3,4,5
Innervates _____
diaphragm
C5,6,7
Innervates ______
serratus anterior
Nerve to Subclavius ____
Innervates subclavius
C5,6
Suprascapular Nerve C(4),5,6
Innervates ____ and ____
supraspinatus & infraspinatus
Suprascapular Nerve C(4),5,6
Travels through ____ deep to transverse scapular ligament
suprascapular notch
Medial Pectoral Nerve ____
(C7),8,T1
Medial Pectoral Nerve (C7),8,T1
Innervates _____
pectoralis minor and major
Medial Brachial Cutaneous Nerve____
Cutaneous sensation to the medial arm
T1
Medial Antebrachial Cutaneous Nerve ____
C8,T1
Medial Antebrachial Cutaneous Nerve C8,T1
Cutaneous sensation to the -____
medial forearm
Terminal Branches From the Medial Cord: Innervates muscles in the _____
medial forearm and hand
Terminal Branches From the Medial Cord: Cutaneous innervation to _____
5th and medial half of 4th digits
Musculocutaneous Nerve C5,6,(7) Pierces _____
coracobrachialis
Upper subscapular C5,6
Innervates ______
subscapularis
Thoracodorsal Nerve C6,7,8
Innervates _____
latissimus dorsi
Lower Subscapular Nerve
Innervates ____ and _____
subscapularis & teres major
plate 433 for simplified brachial plexus
Axillary Nerve C5,6
Innervates ____, _____ and cutaneous sensation to lateral shoulder
deltoid, teres minor
Axillary Nerve __, ___
C5,6
Radial Nerve ____
C5,6,7,8,T1
Radial Nerve C5,6,7,8,T1
Innervates _____
mm of posterior arm & forearm
Radial Nerve Cutaneous innervation to posterior arm, forearm and _______
1st-3rd digits posteriorly
compression squished by ___
bone
entrapment squished by _____
soft tissue
Median Nerve _____
C5,6,7,8,T1
Median Nerve Innervates _____
most mm of anterior forearm and some intrinsic hand mm
Median Nerve Cutaneous innervation to ______ and tips of same digits posteriorly
1st to lateral half of 4th digit anteriorly
423 plate cutaneous innervation
Axillary Artery:
Branch of the _____
subclavian artery