Muscles of the Glenohumeral Joint

Question 1

Name the Origin, Insertion, Action, and Nerve for:

Anterior Deltoid

Answer 1

O: Lateral 1/3 Clavicle

I: Deltoid Tuberosity Humerus

A: Flex, IR, Horiz ADD, ADD (60) GH

N: Axillary N

Question 2

Name the Origin, Insertion, Action, and Nerve for:

Middle Deltoid

Answer 2

O: Acromion

I: Deltoid Tuberosity Humerus

A: ABD - GH

N: Axillary N

Question 3

Name the Origin, Insertion, Action, and Nerve for:

Posterior Deltoid

Answer 3

O: Scapular Spine

I: Deltoid Tuberosity Humerus

A: Ext, ER, Horiz ABD, ADD (60) GH

N: Axillary N

Question 4

Name the Origin, Insertion, Action, and Nerve for:

Latissimus Dorsi

Answer 4

O: Lower T/S SP, Thoracolumbar Fascia

I: Medial border of Bicipital Groove

A: ADD, Ext, IR, Horiz ABD - GH
Retract, Down Rot, Depress - Scapula

N: Thoracodorsal N

Question 5

Name the Origin, Insertion, Action, and Nerve for:

Teres Major

Answer 5

O: Inferior Angle Scapula

I: Medial border of Bicipital Groove

A: ADD, Ext, IR, Horiz ABD - GH

N: Lower Subscapular N

Question 6

Name the Origin, Insertion, Action, and Nerve for:

Pectoralis Major (clavicular)

Answer 6

O: Medial 1/2 Clavicle

I: Lateral Border of Bicipital Groove

A: IR, Flex, Horiz ADD, ADD (90)- GH

N: Medial and Lateral Pectoral N

Question 7

Name the Origin, Insertion, Action, and Nerve for:

Pectoralis Major (Sternal)

Answer 7

O: Sternum & Ribs 2-6)

I: Lateral Border of Bicipital Groove

A: IR, Horiz ADD, ADD, Extend (30Flex)/Flex (HpE) - GH
Protract & Down Rot - Scapula

N: Medial & Lateral Pectoral N

Question 8

Name the Origin, Insertion, Action, and Nerve for:

Coracobrachialis

Answer 8

O: Coracoid Process of Scapula

I: Medial Humerus

A: Flex, ADD, Horiz ADD, (IR) - GH

N: Musculocutaneous N