Where are the cranial nerves located

These can arise from a specific region of the brain stem either the midbrain pons or medulla or they may arise from a junction between two parts. The cranial nerves are 12 pairs of nerves that can be seen on the ventral bottom surface of the brain.

Some of these nerves bring information from the sense organs to the brain.

Where are the cranial nerves located. Why are cranial nerves part of the PNS. The main function of the PNS is to connect the CNS to the limbs and organs essentially serving as a relay between the brain and spinal cord and the rest of the body. In the somatic nervous system the cranial nerves are part of the PNS with the exception of the optic nerve cranial nerve II along with the.

The cranial nerves are 12 pairs of nerves that can be seen on the ventral bottom surface of the brain. Some of these nerves bring information from the sense organs to the brain. Other cranial nerves control muscles.

Other cranial nerves are connected to glands or internal organs such as the heart and lungs. The rest of the cranial nerves originate from the brain stem. These can arise from a specific region of the brain stem either the midbrain pons or medulla or they may arise from a junction between two parts.

The functions of the cranial nerves are typically described as being either sensory or. Cranial nerves are concerned with the head neck and other facial regions of the body. Cranial nerves arise directly from the brain in contrast to spinal nerves and exit through its foramina.

Most of the cranial nerves originate in the brain stem and pass through the muscles and sense organs of the head and neck. Cranial nerves are the 12 nerves of the peripheral nervous system that emerge from the foramina and fissures of the craniumTheir numerical order 1-12 is determined by their skull exit location rostral to caudal. All cranial nerves originate from nuclei in the brainTwo originate from the forebrain Olfactory and Optic one has a nucleus in the spinal cord Accessory while the.

The nerves attached to the brain are the cranial nerves which are primarily responsible for the sensory and motor functions of the head and neck one of these nerves targets organs in the thoracic and abdominal cavities as part of the parasympathetic nervous system. There are twelve cranial nerves which are designated CNI through CNXII for Cranial Nerve using Roman numerals for 1 through 12. Several of the cranial nerves run through bones in the skull.

The cranial nerves can become temporarily or chronically impaired as a result of illness infection inflammation or head trauma. Due to their structure and location each pair of cranial nerves is predisposed to certain medical conditions. The cranial nerves are numbered by their location on the brain stem superior to inferior then medial to lateral and the order of their exit from the cranium anterior to posterior Figures 1 2.

An overview of the brainstem may be useful as this region houses the nuclei that give rise to 10 of the 12 pairs of cranial nerves. The brainstem consists from superior to inferior of the midbrain pons and the medulla oblongata. The midbrain is continuous above with the cerebral hemispheres.

The cranial nerves emerge from the central nervous system above the level of the first vertebrae of the vertebral column. Each cranial nerve is paired and is present on both sides. There are conventionally twelve pairs of cranial nerves which are described with Roman numerals IXII.

Twelve pairs of nervesthe cranial nerveslead directly from the brain to various parts of the head neck and trunk. Some of the cranial nerves are involved in the special senses such as seeing hearing and taste and others control muscles in the face or regulate glands. The cranial nerves are so named because they are located within the cranium or skull inside the brain.

In other words they originate in the brain. See full answer below. The cranial nerves are 12 pairs of nerves that can be seen on the ventral bottom surface of the brain.

Some of these nerves bring information from the sense organs to the brain. Other cranial nerves control muscles. Other cranial nerves are connected to glands or internal organs such as the heart and lungs.

The olfactory nerve is the shortest of the 12 cranial nerves and only one of two cranial nerves the other being the optic nerve that do not join with the brainstem. The specialized olfactory receptor neurons of the olfactory nerve are located in the olfactory mucosa of. The cranial nerves for each of these are.

2 for the midbrain CN 3 4 4 for the pons CN 5-8 and 4 for the medulla CN 9-12. It is important to remember that cranial nerves never cross except for one exception the 4th CN and clinical findings are always on the same side as the cranial. The cranial nerves are nerves that originate in the brain rather than the spinal cord.

There are 12 paired nerves. The seventh cranial nerve the facial nerve originates in the brainstem between the pons and the medulla. It controls movement of the facial expression muscles.