Anatomy Nerves
A nerve is an enclosed cable like bundle of axons the projections of neurons in the peripheral nervous system pns. Sustentacular tissue that surrounds and supports neurons in the central nervous system.
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These nerves are made up of nerve fibers called sensory fibers mechanoreceptor fibers sense body movement and pressure against the body and nociceptor fibers sense tissue injury.
Anatomy nerves. Every thought action and emotion reflects its activity. Afferent efferent and mixed nerves. Peripheral outside of the central nervous system nerves are tubes that are special in their ability to transmit electric impulses along their length and into or away from the central nervous system.
Sensory neurons convey information about the external environment to the brain which in turn converts them into internal electrical impulses. Spinal nerves innervate distribute tostimulate much of the body. The central nervous system contains the brain and spinal cord while the peripheral nervous system contains spinal nerves comprised of motor and sensory neurons.
The other cranial nerves are the vestibulocochlear the glossopharyngeal the vagus spinal accessory and hypoglossal nerves. Motor nerves lead to the muscles and stimulate movement. Extending from the left and right sides of the spinal cord are 31 pairs.
Inside the nerves groups of neurons nerve cells are organized into bundles called fascicles fasciculi. Extending from the inferior side of the brain are 12 pairs of cranial nerves. Cranial nerves innervate parts of the head and connect directly to the brain.
A nerve provides a structured pathway that supports the electrochemical nerve impulses transmitted along each of the axons. Some of the nerves in the body are specialized for carrying information in. The spinal cord and peripheral nerves.
Nerve structure anatomy nerves are the organs that make up the peripheral nervous system pns. They are all discussed in great detail in their respective articles. An illustration of the main nerves of the arm.
Its signaling device or means of communicating with body cells is electrical impulses which are rapid and specific and cause almost immediate responses. Nervous system anatomy and physiology the nervous system is the master controlling and communicating system of the body. Nerves can be categorized into two groups based on where they connect to the central nervous system.
They serve as information pipelines that allow the brain and spinal cord to communicate with other tissues and organs. Comparatively large neuroglial cell hold neurons and capillaries apart create barrier between blood and neurons help break down chemicals from neurons act as monitor in central nervous system. Summary of the cranial nerves.
They are made up of nerve fibers called motor fibers.
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