07/09/2020
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To start off Muscle Monday, today we are looking at the brachiocephalicus muscles in both the dog and the cat!
Each time I put a muscle Monday on, I will explain in more detail than on the image - as it can look scary seeing all of the scientific names. Making it clearer with more detail in turn makes it easier to learn and understand.
The brachiocephalicus muscle is split up into three different muscles: cleidobrachialis, cleidocervicalis and cleidomastoideus. These names correspond to where the muscle is can be found.
There is one difference with this muscle between dogs and cats, that is where the cleidobrachialis comes from. In the dog it comes from the humerus, which is the top front leg bone, whereas in the cat it comes from the ulna, which is one of the lower front leg bones.
Fun fact: in the cat, the remnant of the clavicle (collar bone) is found in this muscle!
🐶🐱Cleidobrachialis
This section of muscle comes from the humerus in the dog 🐶, as previously mentioned this is the upper arm bone, and the ulna in the cat 🐱(one of the lower front leg bones). It goes to the Clavicular intersection - this is where the clavicle (collar bone) used to be.
This muscle is controlled by the axillary nerves.
🐶🐱Cleidomastoideus and cleidocervicalis
Both of these muscles come from the Clavicular intersection, so the collar bone area, but split off to different places. The cleidomastoideus goes to the mastoid process, which is found on the skull, and the cleidocervicalis goes to the median raphe of the neck, which is basically just a line of tissue which connects the two sides of the neck.
Both of these muscles are supplied by the cervical and accessory nerves.
This muscle helps the animals protract their limb, so bring the leg forwards, and extend their shoulder joint.
.school.student .physiostudentx
