Anatomy 35

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You must provide copyright attribution in the edit summary by providing an interlanguage link to the source of your translation. Dog anatomy comprises the anatomical studies of the visible parts of the body of a canine. Details of structures vary tremendously from breed to breed, more than in any other animal species, wild or domesticated, as dogs are highly variable in height and weight. The following is a list of the muscles in the dog along with their origin, insertion, action and innervation. Descending superficial pectoral: originates on the first sternebrae and inserts on the greater tubercle of the humerus.

It both adducts the limb and also prevents the limb from being abducted during weight bearing. It is innervated by the cranial pectoral nerves. Transverse superficial pectoral: originates on the second and third sternebrae and inserts on the greater tubercle of the humerus. It also adducts the limb and prevents the limb from being abducted during weight bearing. Deep pectoral: originates on the ventral sternum and inserts on the lesser tubercle of the humerus.

It acts to extend the shoulder joint during weight bearing and flexes the shoulder when there is no weight. It is innervated by the caudal pectoral nerves. Sternocephalicus: originates on the sternum and inserts on the temporal bone of the head. Its function is to move the head and neck from side to side. It is innervated by the accessory nerve.

Sternohyoideus: originates on the sternum and inserts on the basihyoid bone. Its function is to move the tongue caudally. It is innervated by the ventral branches of the cervical spinal nerves. Sternothyoideus: originates on the first coastal cartilage and inserts on the thyroid cartilage. Its function is also to move the tongue caudally. Omotransversarius: originates on the spine of the scapula and inserts on the wing of the atlas.