上腕三頭筋

Key facts

Muscle.Name

Triceps

Muscle.Latin

musculus triceps brachii

Muscle.Image

Triceps brachii.png

Muscle.Caption

Triceps brachii seen from behind.

Muscle.Image2

Triceps brachii muscle06.png

Muscle.Caption2

Triceps brachii seen from behind. Three different colors represent three different bundles which compose triceps.

Muscle.Origin

Long head: infraglenoid tubercle of scapula Lateral head: above the radial grooveMedial head: below the radial groove

Muscle.Insertion

Olecranon process of ulna

Muscle.Blood

Deep brachial artery, posterior circumflex humeral artery (long head only)

Muscle.Nerve

Radial nerve

Muscle.Action

Extends forearm, long head extends, adducts arm, extends shoulder