Anatomical Kinesiology Exam # 4

A.

Supination

B.

Pronation

C.

Flexion

D.

Extension

What are the flexors of the elbow?

Biceps Brachii , Brachialis , Brachioradialis

Biceps Brachii

Action : flexion ( & supination )

o : LH → supraglenoid fossa

SH → coracoid process

i : radial tuberosity

Brachialis

Action : flexion *true flexor*

o : anterior side of distal half of humerus

i : coronoid process & ulnar tuberosity

Brachioradialis

Action : flexion ( & supination & pronation BUT ONLY GO HALFWAY)

o : lateral supracondylar ridge of humerus

i : styloid process of radius

What are the extensors of the elbow?

Triceps

Triceps

Action : extension

o : LH → infraglenoid fossa

Med H → entire posterior humeral diaphysis

Lat H → posterolateral humerus just inferior to greater tuberosity

i : olecranon process

What are the pronators of the elbow?

Pronator teres & pronator quadratus

Pronator Teres

Action : pronation ( & WEAK FLEXOR )

o : medial epicondyle of humerus coronoid process

i : lateral side of mid radial diaphysis

Pronator Quadratus

Action : pronation

o : distal ¼ of anterior ulna

i : distal ¼ of anterior radius

What are the supinators of the elbow?

Supinator

Supinator

Action : supinator

o : lateral epicondyle of humerus just inferior to radial notch of ulna

i : anterolateral side of proximal 1/3 radius

A.

Abduction

B.

Adduction

C.

External Rotation

D.

Internal Rotation

E.

Horizontal Abduction

F.

Horizontal Adduction

G.

Flexion

H.

Extension

What are the flexors of the shoulder?

Deltoid ( anterior ) , pectoralis major , coracobrachialis , biceps ( SH )

Deltoid ( anterior )

Action : flexion ( & horizontal adduction & adduction )

o : distal 1/3 of clavicle

i : deltoid tuberosity

Pectoralis Major

Action : flexion ( & horizontal adduction & internal rotation )

o : proximal 1/3 of clavicle

i : lateral lip of intertubercular groove

Coracobrachialis

Action : flexion ( & adduction )

o : coracoid process

i : medial surface of the humerus mid shaft

Biceps ( SH )

Action : flexion

o : coracoid process

i : radial tuberosity

What are the extensors of the shoulder?

Deltoid ( Posterior ) & Triceps ( LH )

Deltoid ( Posterior )

Action : extension ( & horizontal abduction & abduction )

o : spine of scapula

i : deltoid tuberosity

Triceps ( LH )

Action : extension

o : infraglenoid fossa

i : olecranon process

What are the abductors of the shoulder?

Supraspinatus & Deltoids

Supraspinatus

Action : abduction

o : supraspinous fossa

i : greater tuberosity of the humerus

Deltoid

Action : abduction

o : acromion

i : deltoid tuberosity

What are the adductors of the shoulder?

Latissimus Dorsi & Teres Major

Latissimus Dorsi

Action : adductors ( & extension & internal rotation )

o : spinous process of T7 - T5 , posterior sacrum , iliac spine , posterior side of ribs 10 -12

i : anteromedial side of humerus * just inferior to intertubercular groove *

Teres Major

Action : adduction ( & extension & internal rotation )

o : inferior angle of scapula

i : medial lip of intertubercular groove

What are the external rotators of the shoulder?

Infraspinatus & teres minor

Infraspinatus

Action : external rotation ( & horizontal abduction )

o : infraspinous fossa

i : greater tuberosity of humerous

Teres minor

Action : external rotation ( & horizontal abduction )

o : lateral border of scapula * just superior to teres major origin *

i : greater tuberosity of humerus

What are the internal rotators of the shoulder?

Subscapularis & teres major

Subscapularis

Action : internal rotation

o : subscapular fossa

i : lesser tuberosity of humerus

Horizontal Adductors

Pectoralis Major , Anterior Deltoid , Coracobrachialis

Horizontal Abductors

Posterior Deltoid , Infraspinatus , Teres Minor