What is the descending pectoral of a horse?

The descending pectoral muscle (Musculus pectoralis descendens) that originates form the manubrium of the sternum and terminates on the crest of the greater tuberclce of the humerus.

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Pectoral muscles:

These muscles fit on the top of the humerus (the upper arm, like ours) and make the connection to the sternum. Their role is to lift the trunk as the serrated muscles. And as told above, they will also have addictive action. They allow the horse to bring his foreleg inwards.

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Where is the point of origin of the pectoral muscle of horses?

The pectoralis descendens (cranial superficial pectoral) originates from the cariniform cartilage of the sternum, and inserts into the humerus. The pectoralis transversus (transverse superficial pectoral) originates from the ventral side of the sternum and inserts on the proximal third of the horse's forearm.

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STRUCTURE: 

The descending pectoral slightly overlaps the cranial edge of the transverse pectoral and the two muscles are not easy to separate. The groove (seam) between the brachiocephalicus and the descending pectoral contains the cephalic vein.

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In horses, the pectoral muscles primarily refer to the muscles located in the chest area. These muscles include the pectoralis superficialis and pectoralis profundus. The pectoralis superficialis is a large muscle that covers the cranial part of the horse's chest, while the pectoralis profundus lies beneath it.

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descending pectoral muscle