Muscles

Arm

Biceps Brachii

Origin

Scapula

Insertion

Top of radius and bicipital aponeurosis to medial part of forearm

Joints Crossed

Shoulder and Elbow

Joint Movements

Flexes elbow

Supinates forearm

Assists in flexion of the shoulder joint

Musculus Biceps Brachii - Definition and Action / Function - Human Anatomy | Kenhub
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Brachialis

Origin

Humerus

Insertion

Ulna

Joints Crossed

Elbow

Joint Action

Flexion at the elbow

Brachialis muscle

Tricep Brachii

Origin

- Long head on scapula just above shoulder joint

- Other 2 head on posterior (back) of the humerus


Insertion

- Olecranon of Ulna

Joints Crossed

- Elbow and shoulder


Actions

- Extension at elbow

- Assist in shoulder extension and adduction

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triceps brachii muscle

Brachioradalialis

Origin

- Laterally at the distal end of the humerus


Insertion

- Laterally at the distal end of the radius


Joints crossed

- Elbow


Joint Action

- Flexion when the forearm is semi pronated (eg drinking)

- And also assists as a flexor for other movements

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Brachioradialis
Arm muscles - 3D anatomy tutorial