Subclavius origin and insertion

Subclavius runs from the first rib to the clavicle.

What are the origin and insertion of subclavius?

Subclavius arises from the first rib and its cartilage, where they meet. It inserts on the groove under the middle third of the clavicle. Its main action is depression of the clavicle. It is supplied by the nerve to subclavius (C5, C6). The attachments, actions and nerve follow Gray (1918).

Paint it on 3D bones: Muscle Origin, Insertion and Action Explorer →

Every attachment and its bone

Origin 1

Origin of subclavius, with the bone each is on
Attachment	Bone
First rib and its cartilage, where they meet	First rib

Insertion 1

Insertion of subclavius, with the bone each is on
Attachment	Bone
Groove under the middle third of the clavicle	Clavicle

Actions

The actions of subclavius, and which are its main ones
Action	What moves	Main or assisting
The collarbone is drawn down and in		Main action

Each action is stated in the anatomical position: standing, arms by the sides, palms forward.

Innervation

The nerve to subclavius (C5, C6).

Sources

Gray (1918), Myology, the muscles connecting the upper extremity to the anterior and lateral thoracic walls

See it in 3D

Visualiser · Biology Muscle Origin, Insertion and Action Explorer Paint a muscle’s origin and insertion on real 3D bones, or click a bone to see what attaches to it. Visualiser · Biology Upper Limb Muscles Explorer 114 upper limb muscle meshes, by compartment.