shoulder complex

Question 1

what is the function, origin and insertion of the sternocleidomastoid

Answer 1

function: flexion, lateral flextion and extension of the neck
origin: upper part of the anterior surface of the manubrium and the superior border and anterior surface of the medial third of the clavicle
insertion: lateral surface of the mastoid process and nuchal line of the occipital bone

Question 2

what is the function, origin and insertion of the subclavius

Answer 2

function - depresses the clavicle down and forwards
origin - junction of the first rib and its cartilage
insertion - subclavian groove of the clavicle between the costoclavicular and conoid ligaments

Question 3

what is the function, origin and insertion of the teres major

Answer 3

function - extension, adduction, medial rotation and horizontal abduction of the arm at the shoulder joint
origin - inferior angle of the scapula
insertion - intertubercular groove of the humerus

Question 4

what is the function, origin and insertion of the teres minor

Answer 4

function - lateral rotation and horizontal abduction of the arm at the shoulder joint, stabalisation
origin - lateral border of the scapula
insertion - greater tubercle of the humerus

Question 5

what is the function, origin and insertion of the infraspinatus

Answer 5

function - lateral rotation, abduction and horazontal abduction of arm at the shoulder joint and stabalisation
origin- infraspinatus fossa on the posterior surface of the scapula
insertion- greater tubercle of the humerus

Question 6

what is the function, origin and insertion of the supraspinatus

Answer 6

function - assists deltoid in abducting the arm and stabilizes glenohumeral joint
origin - all the supraspinatus fossa
insertion - the greater tubercle of the humorous

Question 7

what is the function, origin and insertion of the serratus anterior

Answer 7

function - depression, abduction and upwards rotation of scapula and elevation of the ribs when scapula is fixed
origin - ribs 1-9
insertion - medial border of the scapula

Question 8

what is the function, origin and insertion of the subscapularis

Answer 8

function - medial rotation of the head of the humerus
origin - subscapular fossa
insertion - lesser tubercle of the humerus

Question 9

what is the function, origin and insertion of the levator scapulae

Answer 9

function - elevation and downwards rotation of the scapula
origin - transverse processes of the vertabrae
insertion - superior part of the medial border of the scapula

Question 10

what is the function, origin and insertion of the rhomboid major

Answer 10

function- adduction, downward rotation, elevation, and stabalisation
origin - spinous processes of vertabrae T02 - t05
insertion- medial border of the scapula below the scapular spine

Question 11

what is the function, origin and insertion of the rhomboid minor

Answer 11

function-adduction, downwards rotation, elevation and stabalisation of the scapula
origin -spinous processes of the vertebrae
insertion- medial border of the scapular above the scapular spine

Question 12

what is the function, origin and insertion of the trapezius

Answer 12

function - superior fibers assist in elevation and upward rotation of scapula and extension and lateral flexion of the neck . middle fibers assist in adduction of scapula and inferior fibers assist in depression and upward rotation of scapula
origin - occipital bone, ligamentum nuvhae and spinous processes of vertabrae C07-T12
insertion- accessory nerve and cervical plexus

Question 13

what is the function, origin and insertion of the pectoralis major abdominal head

Answer 13

function - adduction and medial rotation of the arm at the shoulder joint
origin - distal sternum and external oblique fascia
insertion - lateral lip of the intertubercular groove of the humerus

Question 14

what is the function, origin and insertion of the pectoralis major clavicular head

Answer 14

function - flexion of the arm at the shoulder joint
origin - medial half of the clavicle
insertion - lateral lip of the intertubercular groove of the humerus

Question 15

what is the function, origin and insertion of the deltoid (anterior head posterior head and middle head)

Answer 15

function - flexion, horizontal adduction, and medial rotation of the arm at the shoulder joint
origin - lateral third of the clavicle
insertion - deltoid tuberosity on the lateral side of the body of the humerus

Question 16

what is the function, origin and insertion of coracobrachialis

Answer 16

function- flexion, adduction, and horizontal adduction, assists in retaining the head of the humerus in contact with the glenoid cavity
origin- coracoid process of the scapula
insertion- medial surface and the border of the body of the humerus

Question 17

what is the function, origin and insertion of latissimus dorsi

Answer 17

function - extension adduction, and medial internal rotation, downward rotation, depression, adduction at scapula, lateral flextion of spine
origin - spinous processes of vertabrae T07-T12 and L01-L05, and the sacrum, thoracolumbar fascia, inferior portion of the scapula, posterior third of iliac crest
ribs 9-12
insertion - intertubercular groove of the humerus