Origins
The trapezius muscle originates on this bone of the skull
Occipital bone
Pectoralis major (sternal head) inserts here
The intertubercular groove of the humerus
Innervation of teres minor
Axillary nerve
One action of the rhomboid major
Retract scapula/ depress glenoid
Roots of the brachial plexus
C5-T1
The origin of the serratus anterior
Ribs 1-9
Pectoralis minor inserts here
Coracoid Process
innervation of subscapularis
Subscapular nerve
One function of the Pectoralis major
Adduct humerus/ extend humerus/medial rotation of the humerus
Trunks of the Brachial Plexus
Superior, Middle, Inferior
Spines of T2-T5
The serratus anterior inserts here
medial border of the scapula
Innervation of the Triceps long head
Axillary nerve
One function of the teres minor
Lateral rotation of the humerus
The three trunks divide into what components of divisions?
Dorsal and ventral
The Levator scapulae muscle originates here
Transverse process of C1-C4
Intertubercular groove of the humerus
Innervation of triceps lateral head
Radial Nerve
One action of supraspinatus
Abduct humerus
Dorsal divisions will innervate what types of muscles? Ventral divisions will innervate which types of muscles?
Extensors/flexors
Pectoralis major (Clavicular head) originates here
Medial clavicle
Teres minor inserts here
greater tuberosity of the humerus
Innervation of the coracobrachialis
Musculocutaneous nerve
Perform and explain the SITS mnemonic for the rotator cuff muscles
SITS, Thumb, index, middle, ring placement
Branches of the brachial Plexus
Axillary, Radial, Musculocutaneous, medial, ulnar