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It includes the cranial nerves, spinal nerves and their roots and branches, peripheral nerves, and neuromuscular junctions. The anterior horn cells, although technically part of the central nervous system (CNS), are sometimes discussed with the peripheral nervous system because they are part of the motor unit. The autonomic nervous system Oxybutynin (Anturol)- FDA the part of the nervous system concerned with the innervation of involuntary structures, such as Oxybutynin (Anturol)- FDA heart, smooth muscle, and glands within the Oxybutynin (Anturol)- FDA. It is distributed throughout the central and peripheral nervous systems.

Nerve cells are called neurones. A neurone consists of a Oxybutynin (Anturol)- FDA body (with a nucleus and cytoplasm), dendrites that carry electrical impulses to the cell, and a long axon that carries the impulses away from the cell.

The axon of one Oxybutynin (Anturol)- FDA and the dendrites of the next neurone do Oxybutynin (Anturol)- FDA actually touch.

The gap between neurones is called the synapse. Generation of a nerve impulse (action potential) of a sensory neurone occurs Oxybutynin (Anturol)- FDA a result of a stimulus such as light, a particular chemical, or stretching of a cell membrane by sound. Conduction of an impulse why do we cry a neurone occurs from the dendrites to the cell body to the axon. Transmission of a signal to another neuron across a synapse occurs via chemical transmitter.

This substance causes the next neurone to be electrically stimulated and keeps the signal going along a nerve. Ganglia may be divided into sensory ganglia of spinal nerves (spinal or posterior root ganglia) and cranial nerves and autonomic ganglia. They are referred to as spinal or posterior root ganglia. Similar ganglia that are also found along the course of cranial nerves V, VII, VIII, IX, and X are called sensory ganglia of these nerve.

Autonomic ganglia, which are often irregular in shape, are situated along the course of efferent nerve fibers of Oxybutynin (Anturol)- FDA autonomic nervous system. They are found in the paravertebral sympathetic chains, around the roots of the great visceral arteries in the abdomen, and close to, or embedded within, the walls of various viscera. The sensory (afferent) division carries sensory signals by way of afferent nerve fibers from receptors in the central nervous system (CNS).

It can be further subdivided into somatic and visceral divisions. The somatic sensory division carries signals from receptors in the skin, muscles, bones and joints. The visceral Nifedipine (Adalat CC)- FDA division carries signals mainly from the Oxybutynin (Anturol)- FDA of the thoracic and abdominal cavities.

The motor (efferent) division carries motor signals by way of efferent nerve fibers pantoprazole 40 the CNS to effectors (mainly glands and muscles). The somatic motor division carries signals to the skeletal muscles. The visceral motor division, also known as the autonomic nervous system, carries signals to glands, cardiac muscle, and smooth muscle.

It can be further divided into the sympathetic and parasympathetic divisions. The parasympathetic divisions tend to have a calming effect. Nerve fibers of the PNS are classified according to Oxybutynin (Anturol)- FDA involvement in motor or sensory, somatic or visceral pathways. Mixed nerves contain both motor and sensory fibers.

Motor nerves contain motor fibers. A nerve is an organ composed of multiple nerve fibers bound together by sheaths of connective tissue. The sheath adjacent to the neurilemma is the endoneurium, which houses blood capillaries that feed Oxybutynin (Anturol)- FDA and oxygen to the Oxybutynin (Anturol)- FDA. In large nerves, fibers are bundled into fascicles and wrapped in a fibrous perineurium.

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