extensor carpi radialis longus muscle

Extensor carpi radialis longus is one of the five main muscles that control movements at the wrist. This muscle is quite long, starting on the lateral side of the humerus, and attaching to the base of the second metacarpal bone (metacarpal of the index finger). [WP,unvetted]. Every claim on this page comes from the Leumas anatomy graph and carries its source.

What the extensor carpi radialis longus muscle is

Extensor carpi radialis longus is one of the five main muscles that control movements at the wrist. This muscle is quite long, starting on the lateral side of the humerus, and attaching to the base of the second metacarpal bone (metacarpal of the index finger). [WP,unvetted]. The atlas records it as a muscle at the organ scale in the human body.

Where the extensor carpi radialis longus muscle is

It sits in the upper limb, within the muscular system. Not positioned individually. Drawn inside the structure this dataset says contains it — the containment is asserted, the exact spot within it is not.

What the extensor carpi radialis longus muscle connects to

The atlas records 7 typed relationships for it, across 5 kinds of connection. part of forelimb zeugopod.

Supply and innervation

Innervation: radial nerve.

Also called

Also recorded as extensor carpi radialis longus and musculus extensor carpi radialis longus. Searching any of those names reaches this page.

Source

Uberon multi-species anatomy ontology (Mungall et al.), CC BY 4.0. Term UBERON:0001524, version 2026-06-19, retrieved 2026-08-24. Licence: CC-BY-4.0.

• Part of: forelimb zeugopod.
• A kind of: extensor muscle, forelimb zeugopod muscle and muscle of shoulder.
• Innervated by: radial nerve.
• inserts into: metacarpal bone of digit 2.
• originates from: distal epiphysis of humerus.

Questions

Where is the extensor carpi radialis longus muscle?

It sits in the upper limb, within the muscular system. Not positioned individually. Drawn inside the structure this dataset says contains it — the containment is asserted, the exact spot within it is not.

What does the extensor carpi radialis longus muscle connect to?

Part of: forelimb zeugopod.

Is the extensor carpi radialis longus muscle the same in other species?

Leumas holds the same relationship vocabulary for every species it carries, so where another dataset records this structure you can put the two side by side on /compare.