Upper Extremity Joints and Muscles (Brachium)

Question 1

Glenohumeral Joint

Answer 1

Articulating bones: humerus, scapula, clavicle
Joint type: ball and socket
Movement: flexion, extension, abduction, adduction, rotation, circumduction

Question 2

Pectoralis Major

Answer 2

on the anterior thorax

Action: flexion, adduction, medial rotation of brachium

Question 3

Latissimus Dorsi

Answer 3

Posterior thorax to brachium

Action: extension, adduction, medial rotation of brachium

Question 4

Deltoid

Answer 4

Major abductor of the arm
Action: anterior part does flexion and medial rotation of brachium, posterior part does extension an lateral rotation of brachium

Question 5

Coracobrachialis

Answer 5

Small muscle near the medial side of the biceps brachii

Action: adduction and flexion of brachium

Question 6

Teres Major

Answer 6

Larger muscle compared to trees minor, located inferior to minor
Action: medial rotation and extension of brachium

Question 7

Teres Minor

Answer 7

Smaller muscle compared to Teres Major

Action: lateral rotation and adduction of brachium

Question 8

Supraspinatus

Answer 8

located in supraspinous fossa

Action: abduction of brachium

Question 9

Infraspinatus

Answer 9

Located in the infraspinous fossa

Action: lateral rotation of brachium

Question 10

Subscapularis

Answer 10

located in the subscapular fossa

Action: medial rotation of brachium