PS363 Lecture Notes - Lower Motor Neuron, Alpha Motor Neuron, Motor Neuron
Document Summary
The muscles in the body can be described according to two broad categories: Smooth: lines the digestive tract, arteries and related structures, plays a role in peristalsis and the control of blood pressure and blood flow. Striated there are two types of striated muscles: cardiac muscle is the heart muscle. Contracts rhythmically innervations of the heart from the ans functions to accelerate or slow down the heart rate: skeletal muscle. Constitutes the bulk of muscle mass in the body. Contains hundreds of muscle fibers, each innervated by a single axon. Is enclosed in a connective tissue sheath that forms tendons branch from the cns (see fig. Under voluntary control and it generates behaviour. Movement in the direction that closes the knife is called flexion: the muscles that cause flexion are called flexors. Because they work together, they are called synergists. Movement in the direction that opens the knife is called extension: the muscles that cause extension are called extensors.
