Coracobrachialis: illustrated left

• Origin: Coracoid process of scapula.
• Insertion: Middle and medial shaft of humerus.
• Action: Flexes and adduct arm.

Coracobrachialis
Source: Atlas of Skeletal Muscles R J Stone & J A Stone, 1990



Biceps brachii: illustrated right

• Origin: Long head originates from tubercle superior to
glenoid cavity; short head originates from coracoid
process of scapula.
• Insertion: Radial tuberosity (radius) and bicipital
aponeurosis
• Action: Flexes and supinates forearm; flexes arm.


Biceps Brachii
Source: Atlas of Skeletal Muscles R J Stone & J A Stone, 1990


Brachioradialis: illustrated left

• Origin: Medial and lateral borders of distal end of humerus.
• Insertion: Superior to styloid process of radius.
• Action: Flexes forearm.

Brachioradialis

Source: Atlas of Skeletal Muscles R J Stone & J A Stone, 1990



Brachialis
Source: Atlas of Skeletal Muscles
Brachialis: illustrated right R J Stone & J A Stone, 1990

• Origin: Distal anterior surface of humerus.
• Insertion: Ulnar tuberosity and coronoid process of ulna.
• Action: Flexes forearm.


Triceps brachii: illustrated left

• Origin: Longhead originates from infraglenoid tubercle of
scapula; lateral head originates from lateral and posterior
surface of humerus; medial head originates from entire
posterior surface of humerus inferior to a groove for the
radial nerve.
• Insertion: Olecranon of ulna.
• Action: Extends forearm; extends arm.

Triceps brachii
Source: Atlas of Skeletal Muscles
R J Stone & J A Stone, 1990
Title: Cert III Exercise Science Resource Manual
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88: 070412 Version # 3
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