Cranial nerves essay

When damaged and extended, the tongue will move towards the weaker or damaged side, as shown in the image. Damage to the olfactory nerve I can cause an inability to smell anosmiaa distortion in the sense of smell parosmiaor a distortion or lack of taste.

The ganglion of the sympathetic nervous system is made of various types of cells including the nerve cells and the supporting cells. From the exit of the preganglionic nerve fiber from the exit of the spinal nerve to the sympathetic ganglion, the white rami communicantes protects the nerve fiber, the post-ganglionic nerve fiber is protected till the point it meets the spinal nerve by the gray rami communicantes Grays, Basic and Applied, London: The Nervous Tissue, In.

The sensory division of the facial nerve supplies the front two-thirds of the tongue and also portions of the middle ear.

These tracts extend between the spinal cord and other parts of the brain. In other parts, the parasympathetic nervous system appears scattered. This nucleus also supplies the vagus and the accessory nerves. The brain stem is made up of three structurally and functionally connected regions.

The trochlear nerve also plays a role in the movement of the eyes. The vestibular part is responsible for innervating the vestibules and semicircular canal of the inner ear ; this structure transmits information about balanceand is an important component of the vestibuloocular reflexwhich keeps the head stable and allows the eyes to track moving objects.

These regions are the Medulla Oblongata, the Pons, and the Midbrain. They contain axons of corticospinal corticopontine and corticobolbar motor neurons.

It receives a signal from the central nervous system and sends it to the effector organ.

The ventral nerve root of the spinal cord is that point at which the nerve fibre exits the spinal cord. Eds Bloom and Fawcett: In the sympathetic ganglion, the preganglionic nerve fibers meet the post-ganglionic nerve fibers.

The trigeminal nerve plays a role in controlling the muscles needed for chewing.

The Autonomic Nervous System And The Cranial Nerves Essay Sample

Often the nerves pass through holes in the skull, called foraminaas they travel to their destinations. It also supplies the submandibular and the sublingual salivary glands. The vestibulocochlear nerve reaches the organs that control balance and hearing in the temporal bone, and therefore does not reach the external surface of the skull.

Special sensory is the sense of smell or olfaction. In the ganglion of the sympathetic nervous system, the signal is relayed.

Cranial Nerves – Summary

The sixth cranial nerve is the abducent nerve that supplies the rectus lateralis oculi. It also carries oxygen, glucose, and other needed chemicals from the flood to neurons, and neurogla.

Cerebrospinal fluid is a clear, colorless, liquid that protects the brain and spinal cord against chemical and physical injuries. In the brain, the preganglionic nerve fibers usually arise from gray mater of the midbrain and the medulla oblongata. In adults, the brain has a mass of about three pounds.

Frequently, the optic nerve is considered to be an extension of the brain rather than a separate nerve. These two components enable opposing actions, thus helping to comprehensively control the functioning.

The eighth cranial nerve is the statoacoustic nerve, which help in hearing and balance. The outcome of ANS involvement in severe tetanus is poor. The body is "capable of almost everything, but it would not be possible, without the brain receiving information, and analyzing the information.

This involves surgical placement of a device that stimulates the vagus nerve. The hypoglossal nerve XII exits the skull using the hypoglossal canal in the occipital bone and reaches the tongue to control almost all of the muscles involved in movements of this organ.

The portion of the central nervous system is contained in the cranium.

The Brain and Cranial Nerves

Each cranial nerve pair controls specific functions of the human body.VIII. Sixth Cranial Nerve Palsy: Costs of Services and Treatments * Computed Tomography (CT) of the head and neck with contrast for the diagnosis of sixth cranial nerve palsy range from $$ * Magnetic Resonance Imaging (MRI) of the head and neck range from $$, depending on the type of test being performed.

The Brain and Cranial Nerves Essay examples Words | 7 Pages The Brain and Cranial Nerves One of the most complex and fascinating things in.

Cranial Nerves The brain and spinal cord (CNS) are connected to parts of the body by nerves and cell bodies called the peripheral nervous system. The PNS contains all of. The Brain and Cranial Nerves One of the most complex and fascinating things in the human body is the brain.

The body is "capable of almost everything, but it would not be possible, without the brain receiving information, and analyzing the information." The brain is aware of its surroundings, via input from the spinal cord and cranial nerves.

Cranial Nerves The human body is a unique and fascinating entity. There is not much notice taken of the features the human body is capable of. The brain is necessary to perform day-to-day actions, such as the ability to speak, and see amongst us.

Cranial Nerves The brain and spinal cord (CNS) are connected to parts of the body by nerves and cell bodies called the peripheral nervous system. The PNS contains all of the nervous tissue outside the brain and spinal cord.

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Cranial nerves essay
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