Last update:

Triceps Brachii Muscle – Long Head

image descriptionTriceps Brachii Muscle - Long Head

The long head of the Triceps brachii is one of three heads that make up the muscle. It descends between teres minor and major, dividing the wedge-shaped interval between them and the humerus into triangular and quadrangular spaces.

Posterior view of the shoulder and arm triceps brachii long head highlighted. Muscles labelled - trapezius, deltoid, teres major, teres minor, latissimus dorsi, triceps brachii long head, triceps brachii lateral head, triceps brachii medial head.
Posterior view of the shoulder and arm triceps brachii long head highlighted. Muscles labelled - triceps brachii long head, triceps brachii lateral head, triceps brachii medial head.
Posterior view of the shoulder and arm triceps brachii long head labelled.
1
2
3

image descriptionAttachments of Triceps Brachii Long Head : Origin & Insertion

Origin: (proximal attachment)
a. Infraglenoid tubercle of scapula.

Insertion: (distal attachment)
a. Posterior olecranon process of ulna.

Posterior view of the shoulder and arm triceps brachii long head highlighted. Muscles labelled - trapezius, deltoid, teres major, teres minor, latissimus dorsi, triceps brachii long head, triceps brachii lateral head, triceps brachii medial head.
Posterior view of the shoulder and arm triceps brachii long head highlighted. Muscles labelled - triceps brachii long head, triceps brachii lateral head, triceps brachii medial head.
Posterior view of the shoulder and arm triceps brachii long head labelled.
Posterior view of shoulder and arm. Origin and insertion of triceps brachii long head labelled.
1
2
3
4

Actions of Triceps Brachii Long Head:

a.   image description Extends the forearm at elbow.

Slide 1 of the animation showing forearm extension at the elbow.
Slide 2 of the animation showing forearm extension at the elbow.
Slide 3 of the animation showing forearm extension at the elbow.
Slide 4 of the animation showing forearm extension at the elbow.
Slide 5 of the animation showing forearm extension at the elbow.

b. It also extends the arm at the shoulder.

Innervation of Triceps Brachii Long Head:

a. Radial Nerve (C7, C8)

An Overview of the Posterior Muscles of the Arm:

Test yourself image of the posterior arm and shoulder. Muscles labelled: trapezius, deltoid, teres minor, teres major, teres minor, teres major, triceps brachii long head, triceps brachii lateral head, latissimus dorsi, triceps brachii medial head.
Test yourself image of the posterior arm and shoulder. Muscles labelled: supraspinatus, deltoid, infraspinatus, teres minor, teres major, triceps brachii long head, triceps brachii lateral head, latissimus dorsi, triceps brachii medial head.
Test yourself image of the posterior arm and shoulder. Muscles labelled: supraspinatus, deltoid, infraspinatus, teres minor, teres major, triceps brachii long head, triceps brachii lateral head, latissimus dorsi, triceps brachii medial head.
Test yourself image of the posterior arm and shoulder. Muscles labelled: infraspinatus, teres minor, teres major, triceps brachii long head, triceps brachii lateral head, latissimus dorsi, triceps brachii medial head.
Test yourself image of the posterior arm and shoulder. Muscles labelled: infraspinatus, teres minor, teres major, triceps brachii long head, triceps brachii lateral head, latissimus dorsi, triceps brachii medial head.
Test yourself image of the posterior arm and shoulder. Muscles labelled: teres minor, teres major, teres minor, teres major, triceps brachii long head, triceps brachii lateral head, latissimus dorsi, triceps brachii medial head.
Test yourself image of the posterior arm and shoulder. Muscles labelled: teres major, triceps brachii long head, triceps brachii lateral head, latissimus dorsi, triceps brachii medial head.
Test yourself image of the posterior arm and shoulder. Muscles labelled: triceps brachii long head, triceps brachii lateral head, latissimus dorsi, triceps brachii medial head.
Test yourself image of the posterior arm and shoulder. Muscles labelled: triceps brachii long head, triceps brachii lateral head, triceps brachii medial head.
Test yourself image of the posterior arm and shoulder. Muscles labelled: triceps brachii long head, triceps brachii lateral head.
Test yourself image of the posterior arm and shoulder. Muscles labelled: triceps brachii long head.
Test yourself image of the posterior arm and shoulder. Origin and insertion of triceps brachii long head.
Test yourself image of the skeleton of the posterior arm and shoulder.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Related Articles
Featured image Featured image showing two views of the posterior upper arm and shoulder. The image on the left shows the bony elements and the muscles of the posterior upper arm and shoulder, the image on the right shows isolated Triceps Brachii Medial head.
Triceps Brachii Muscle: Medial Head

The medial head of the Triceps brachii arises from inferior two-thirds of the humerus to insert, along with the other two heads of the triceps, on the olecranon of the ulna.

Featured image showing two views of the posterior upper arm and shoulder. The image on the left shows the bony elements and the muscles of the posterior upper arm and shoulder, the image on the left shows isolated Triceps Brachii Long head.
Triceps Brachii Muscle: Long Head

The long head of the Triceps brachii is one of three heads that make up the muscle. It descends between teres minor and major, dividing the wedge-shaped interval between them and the humerus into triangular and quadrangular spaces.

Featured image showing two views of the posterior upper arm and shoulder. The image on the left shows the bony elements and the muscles of the posterior upper arm and shoulder, the image on the left shows isolated Triceps Brachii Lateral head.
Triceps Brachii Muscle: Lateral Head

The lateral head of the Triceps brachii, one of three heads of the muscle, originates from the humerus, superior to the radial groove to insert on the olecranon process.