psoas major muscle in dogs

The psoas major is a long fusiform muscle placed on the side of the lumbar region of the vertebral column and brim of the lesser pelvis. It joins the iliacus muscle to form the iliopsoas. In less than 50 per cent of subjects the psoas major is accompanied by the psoas minor. [WP,unvetted]. Every claim on this page comes from the Leumas anatomy graph and carries its source.

What the psoas major muscle is

The psoas major is a long fusiform muscle placed on the side of the lumbar region of the vertebral column and brim of the lesser pelvis. It joins the iliacus muscle to form the iliopsoas. In less than 50 per cent of subjects the psoas major is accompanied by the psoas minor. [WP,unvetted]. The atlas records it as a muscle at the organ scale in the dog.

Where the psoas major muscle is

It sits within the muscular system. Only the system is known. The position shown carries almost no spatial information.

What the psoas major muscle connects to

The atlas records 4 typed relationships for it, across 4 kinds of connection. a kind of psoas muscle.

Supply and innervation

This dataset asserts no arterial supply, venous drainage or innervation for the psoas major muscle. Only a minority of structures carry those edges here, so an empty answer means nothing has been recorded — not that there is nothing to record.

Also called

Also recorded as psoas major and m. psoas major. Searching any of those names reaches this page.

Source

Uberon multi-species anatomy ontology (Mungall et al.), CC BY 4.0. Term UBERON:0001298, version 2026-06-19, retrieved 2026-08-24. Licence: CC-BY-4.0.

• A kind of: psoas muscle.
• inserts into: lesser trochanter.
• originates from: transverse process of vertebra.
• antagonist of: gluteus maximus.

Questions

Where is the psoas major muscle?

It sits within the muscular system. Only the system is known. The position shown carries almost no spatial information.

What does the psoas major muscle connect to?

A kind of: psoas muscle.

Is the psoas major muscle the same in other species?

This page describes the dog. The human record of the same structure sits beside it on /compare, over one shared model rather than two atlases built separately.