Ana3D

pectoralis major muscle

Musculus pectoralis major

Muscular

3D model: pectoralis major muscle
pectoralis major muscle
3D models: Z-Anatomy - The libre 3D atlas of anatomy - CC-BY-SA 4.0 (https://github.com/Z-Anatomy/Models-of-human-anatomy), by Gauthier Kervyn and contributors; derived from BodyParts3D - The Database Center for Life Science - CC-BY-SA 2.1 Japan; Z-Anatomy states that models "Brainder" (A. Winkler, CC BY-SA 3.0) and "Cranial Nerves and Foramina" (University of Dundee, CAHID, CC BY 4.0) were used as reference/included and adapted. Converted to compressed glTF (curves as tubes, simplified, inner ear and kidney models left out) by the 3D Anatomy project; licensed under CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0/).

In 1 atlas

Key points

  • The pectoralis major muscle is a broad, fan-shaped muscle on the front of the chest that forms the anterior axillary fold.
  • Its clavicular and sternocostal heads converge on a tendon attached to the lateral lip of the intertubercular sulcus of the humerus.
  • It draws the arm towards the body and rotates it inwards, while its heads contribute differently to forward and backward movement.
  • The medial pectoral nerve and lateral pectoral nerve supply the muscle.

Read the guide: Pectoralis major: anatomy, location and function

Definition

main human chest muscle

Source: Wikidata · Licence: CC0-1.0

Description from Wikidata (https://www.wikidata.org/), available under CC0 1.0 (https://creativecommons.org/publicdomain/zero/1.0/).

Relations

Origin
clavicle, sternum, costal cartilage, Rectus sheath
Insertion
intertubercular sulcus of the humerus
Action
flexion of the arm at the shoulder joint, adduction of the arm at the shoulder joint, medial rotation of the arm at the shoulder joint, extension of the arm via the shoulder joint
Arterial supply
thoraco-acromial artery, lateral thoracic artery, superior thoracic artery
Venous drainage
lateral thoracic vein, pectoral veins

Sub-structures

Neighbouring structures

Practice questions

Read more

Wikipedia (English)

Identifiers

TA2
2301
TA98
A04.4.01.002
FMA
9627
UBERON
0002381
Wikidata
Q532798