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Nerves
...  afferent and efferent nerves. Nerves are an essential part of our anatomy. The peripheral nervous system contains more than 100 billion nerve cells. The peripheral nervous system has two parts: The somatic Nervous System, which contains nerves that are connected to the brain and spinal cord through muscles that you control consciously, these are called voluntary or skeletal muscles. It also has  ...

Skeletal Muscles
...  Control of Movement Unlike the other two types of muscles where they contract even without thinking of it, the skeletal muscle is voluntarily-controlled. In medical terms, the control is by the somatic nervous system. It moves only when you tell it to move. That makes it rationale to say that your arm will stay in its place unless you make it move, while your heart keeps on beating and your  ...

Cholinergic Stimulation
...  stimulation is the response of the somatic motor neurons when a stimulus is present. It reacts by releasing acetylcholine from the synaptic vesicles found in the neurons. The chemical neurotransmitter is crucial for the propagation of nerve impulse. It crosses the synapse to stimulate the contraction of muscles such as the heart. Here are the things you must understand about it. The  ...

Abducens Nerve
...  system is divided into two parts: the central nervous system and the peripheral nervous system. The peripheral nervous system is further subdivided into the autonomic nervous system and the sensory-somatic nervous system. The sensory-somatic system consists of 12 pairs of cranial nerves and 31 pairs of spinal nerves. The sixth pair among these 12 pairs is the abducens nerves. Anatomy books  ...

Accessory Nerve
...  accessory nerve controls particular muscles in the neck. It is one of the eleventh pair of the twelve pairs of cranial nerves. There are twelve cranial nerves found in the sensory-somatic system. The sensory-somatic system forms one of the two subdivisions of the peripheral nervous system. The peripheral nervous system, together with the central nervous system, comprises the nervous system.  ...

Mammary Glands
...  When a woman is pregnant or lactating (sometimes, even when she’s not), a superificial venous plexus is evident on the surface of the mammary skin. Innervation to the breasts by way of sensory somatic neurons is supplied by the fourth, fifth and sixth thoracic nerves. The somatic neurons come from the thoracic nerves’ anterior and lateral branches. A sensory stimulus triggers the  ...


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