superficial chest, extrinsic shoulder muscles, neck

Question 1

SCM sternocleidomastoid

Answer 1

innervation: spinal accessory nerve insertion: mastoid process origin : medial clavicle and manubrium blood supply : occipital artery action: rotation and extension of head, flexion of neck

Question 2

Pectoralis major

Answer 2

innervation: medial and lateral pectoral nerve, insertion: crest of greater tubercle of humerus origin:clavicle, sternum, and upper ribs. blood supply: lateral thoracic artery action: adduction of humerus and internal rotation of humerus

Question 3

Pectoralis minor

Answer 3

innervation: medial pectoral nerve insertion: coracoid process origin: anterior aspect of 3rd and 5th ribs blood supply: lateral thoracic artery action: scapular stabilization, adduction and downward rotation

Question 4

omohyoid

Answer 4

innervation: ansa cervicalis, upper cervical insertion:hyoid origin:superior border of scapula blood supply: trasverse cervical artery action: depresses larynx and hyoid bone

Question 5

deltoid

Answer 5

innervation: axillary nerve, insertion: deltoid tuberosity of the humerus, origin: clavicle, acromion, spine of scapula blood supply: thoracocromial artery action: last 80% of abduction of humerus, flexion and extension of humerus

Question 6

infrapinatus

Answer 6

innervation: suprascapular nerve insertion: greater tubricle of humerus, origin: infraspinous fossa of scapula. blood supply: suprascapular artery action: extends and externally rotates the arm rotator cuff

Question 7

supraspinatus

Answer 7

innervation: suprscapular nerve (C5/C6) insertion: greater tubricle of humerus, origin: supraspinous fossa of scapula blood supply: suprascapular artery action: abduction of the arm, laterally rotates abducts arm first 20%

Question 8

subscapularis

Answer 8

innervation: subscapular nerve insertion:lesser tubercle of humerus origin:subscapular fossa of scapula blood supply: subscapular artery action: extends and internally rotates arm

Question 9

teres major

Answer 9

innervation: lower subscapular nerve insertion: medial lip of the intertuberculer sulcus of the humerus, origin: dorsal aspect of inferior border of scapula blood supply: thoracodorsal, action: adduction, extension, internal rotation of the arm

Question 10

teres minor

Answer 10

innervation: axillary nerve c5/c6 insertion: greater tubercle of humerus origin: lateral border of scapula blood supply: circumflex scapular artery action: externally /laterally rotates the arm, adducts/extends