Test 3 Part 1 Flashcards
With only two exceptions, what provides all motor and sensory innervation to the upper limb?
Brachial Plexus
What are the two exceptions Regarding nerve supply of upper limb?
- T2 > Intercostobrachial N. provides sensation to proximal medial portion of arm.
- CN XI Spinal Accessory motor innervation to trapezius m.
Upper trapezius motion
shoulder elevation
extension of head and neck
Middle Trap Motion
scapular retraction
Lower trapezius motion
scapular depression
scapular upward rotation
Latissimus Dorsi Origin
Thoracolumbar fascia
iliac crest
spinous process T7-L5
Latissimus Dorsi Innervation
Thoracodorsal nerve
Teres Major Origin and insertion
Inf angle of scapula
Insertion: Mdial lip bicipital groove
Teres Major innervation
lower sub-scapular nerve.
Latissimus Dorsi and Teres Major Action
Active internal rotation of glenohumeral joint
Active Adduction of the glenohummeral
Active extension of the glenohumeral joint
Levator Scapulae Origin
transverse process of upper cervical vertebrae
Levator scapulae insertion
medial border of scapula
levator scapulae action
elevate the scapula
Rhomboid major and minor origin
spinous processes of the 2nd to 5th thoracic vertebrae
Rhomboid major and minor insertion
medial border of scapula
3 muscles that are scapular stabalizers
levator scapulae
rhomboid major
rhomboid minor
What nerve innervates the 3 scapular stabalizers?
levator scapulae
rhomboid major
rhomboid minor
dorsal scapular nerve (C5)
Rhomboids action
retract and rotate the scapula medially and upward.
Deltoid Origin
Spine of Scapula
Acromion of scapula
clavicale
Deltoid Insertion
deltoid tuberosity
Anterior deltoid action
active flexion and internal rotation of glenohumeral joint
Middle deltoid action
active abduction of glenohumeral joint
posterior deltoid
active extension and external rotation of glenohumeral joint
Deltoid Muscle innervation
Axillary nerve innervates ant. middle, and post portions of deltoid muscles
