It originates at the acromion process and inserts at the deltoid ridge. When contracted, it raises and rotates the humerus outward. Spinodeltoid
A stout and short muscle lying posterior to the acromiodeltoid. It lies along the lower border of the scapula, and it passes through the upper forelimb, across the upper end of muscles of the upper forelimb. It originates at the spine of the scapula and inserts at the deltoid ridge. Its action is to raise and rotate the humerus outward. Head
Masseter
The Masseter is a great, powerful, and very thick muscle covered by a tough, shining fascia lying ventral to the zygomatic arch, which is its origin. It inserts into the posterior half of the lateral surface of the mandible. Its action is the elevation of the mandible (closing of the jaw). Temporalis
The temporalis is a great mass of mandibular muscle, and is also covered by a tough and shiny fascia. It lies dorsal to the zygomatic arch and fills the temporal fossa of the skull. It arises from the side of the skull and inserts into the coronoid process of the mandible. It too, elevates the jaw. Ocular
Cats have three eyelids. The cats third eyelid is known as the nictitating membrane. It is located in the inner corner of the eye, which is also covered by conjunctiva. In healthy cats, the conjunctiva of the eyelids is not readily visible and has a pale, pink color. Integumental
The two main integumental muscles of a cat are the platysma and the cutaneous maximus.
Brunner found that all of the male family members with this defect reacted aggressively when angry, fearful, or frustrated. The defect discovered was later found to be a mutation in the gene that codes for monoamine oxidase A (MAOA gene). Brunner said that an "MAO-A deficiency is associated with a recognizable behavioural phenotype that included disturbed regulation of impulsive aggression".A letter published by Hebebrand and Klug (1995) criticized Brunners findings for not using strict DSM criteria. Society and culture
Brunners findings have been used to argue that genetics, rather than decision-making processes, can cause criminal activity. Evidence supporting the genetic defense stems from both Brunners findings and a series of studies on mice. To prove the correlation between MAO-A deficiency and aggression in courts, it is often contended that individuals cannot be held accountable for their genes, and as a result, should not be held responsible for their dispositions and resulting actions. References


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