Musculus pectoralis transversus
The transverse pectoral connects the two forelimbs across the ventral chest. It originates from the cranial sternum and inserts on the medial fascia of the forearm. Its actions are to adduct the forelimb and provide ventral thoracic support. It is innervated by the cranial pectoral nerves (roughly C7-C8). It forms part of the muscular chest between the forelegs.
Origin: Cranial sternum
Insertion: Medial fascia of the forearm
Action: Adducts the forelimb; provides ventral thoracic support
Innervation: Cranial pectoral nerves (C7-C8)
Isolated injury is uncommon. Relevant in evaluations of pectoral trauma or after falls.
## Overview Pectoral myopathy from overexertion is strain or damage to the pectoral muscles from excessive lateral forces, such as wide jumps or slippery footing. Horses stand base-wide, have a short
Swelling or pain between the forelegs after trauma should be evaluated.
## Overview Pectoral myopathy from overexertion is strain or damage to the pectoral muscles from excessive lateral forces, such as wide jumps or slippery footing. Horses stand base-wide, have a shortened stride, resist tight turns, and show pain and swelling in the girth area. ## Causes Overload during work. ## Diagnosis Palpation and clinical gait changes. Bloodwork if rhabdomyolysis is suspected. ## Treatment Rest, anti-inflammatories, and controlled rehabilitation. ## Recovery and Prognosis Good. ## Prevention Appropriate conditioning and footing. Signs include: base-wide stance; shortened stride; reluctance to turn tightly; pain between the front legs; swelling in the girth area
Isolated injury is uncommon. Relevant in evaluations of pectoral trauma or after falls.
Swelling or pain between the forelegs after trauma should be evaluated.
See the Transverse Pectoral on our interactive 3D horse model. Open 3D Model