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Nervous system, In the peripheral system, the cranial and spinal nerves,…
Nervous system
Anatomical division
Central
Peripheral
Brain
Is the largest part of the brain
And
Is located in the anterior and middle cranial fossae
Diencephalon
Forms the central portion
Telencephalon
Forms the brain hemispheres
Separated by
The cerebral longitudinal fissure
Contains
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The lobes are 4 :
Parietal lobe:
behind the central sulcus and over the lateral sulcus
Temporal lobe:
inferior to the lateral sulcus
Frontal lobe:
area anterior to central sulcus
Occipital lobe:
behind the Pareto-occipital sulcus
Covered by
A layer of gray matter
CEREBRAL CORTEX
Inside
Lateral ventricles, basal nuclei and nerve fibers
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Autonomic nervous system
Somatic nervous system
sympathetic system
The parasympathetic nervous system
In the peripheral system, the cranial and spinal nerves, consisting of nerve fiber or axon fascicles, conduct information to and from the nervous central system. These nerves surrounded by fibrous pods but in conformity with other parts of the body are unprotected these nerves.
Is the voluntary component of the peripheral nervous system. It consists of all the fibers within cranial and spinal nerves that enable us to perform voluntary body movements (efferent nerves) and feel sensation from the skin, muscles and joints (afferent nerves). Somatic sensation relates to touch, pressure, vibration, pain, temperature, stretch and position sense from these three types of structures.
Sensation from the glands, smooth and cardiac muscles is conveyed by the autonomic nerves.
Is the involuntary part of the peripheral nervous system. Further divided into the sympathetic (SANS), parasympathetic (PANS) systems, it is comprised exclusively of visceral motor fibers. Nerves from both these divisions innervate all involuntary structures of the body.
Autonomic nerves synapse within autonomic ganglia before reaching their target organ, thus all of them have presynaptic and postsynaptic parts.
Presynaptic fibers originate from CNS and end by synapsing with neurons of the peripheral autonomic ganglia.
Postsynaptic fibers are the axons of ganglion neurons, extending from the ganglion to peripheral tissues.
The sympathetic system adjusts our body for situations of greater physical activity.
Your response actions are
Regulates the body to conserve energy, activating the activities of "rest and digest" or "feed and reproduce"
And what they do
The nerves of the peripheral nervous system?
Slow down the actions of the cardiovascular system, divert blood away from the muscles, and increase peristalsis and gland secretion.
The brain and spinal cord are the main centers in which the correlation and integration of nervous information occurs.
Both the brain and spinal cord are covered by a system of membranes, called meninges and are suspended in the fluid cerebrospinal; are also protected by the bones of the skull and spine vertebral.
Processes auditory information, recognizes language and builds memory
Touch, taste, pressure, pain and temperature
Interpretation and analysis of visual stimuli
Process information on movement, speech, planning and reasoning
"fight or flight"
stimulating for faster breathing, increased heart rate, elevated blood pressure, dilated pupils, and redirection of blood flow from the skin, kidneys, stomach, and intestines to the heart and muscles, where needed.
