Cranial nerve 2 function

Cranial nerves are the nerves that emerge directly from the brain of which there are conventionally considered twelve pairs. In this module you will learn the basic subdivisions of the vertebrate nervous system.

Cranial nerves are the nerves that emerge directly from the brain of which there are conventionally considered twelve pairs.

Cranial nerve 2 function. Some of the cranial nerves are responsible for sensory and motor functions as they contain only sensory fibres and motor fibres. Others are mixed nerves because they include both sensory and motor fibres. Only cranial nerves I and II are purely sensory and are responsible for the sense of smell and vision optic nerve II.

The rest of the cranial nerves contain both afferent and efferent fibres and are therefore. The optic nerve is the second cranial nerve CN II responsible for transmitting visual information. The optic nerve contains only afferent sensory fibers and like all cranial nerves is paired.

During embryogenesis the optic nerve is formed in the retina exits the orbit via the optic canal and is relayed throughout the central nervous system CNS. Cranial nerve 2 is a special somatic afferent nerve which innervates the retina of the eye and brings visual information to the brain. Key facts about the optic nerve CN II Type.

The functions of the cranial nerves are typically described as being either sensory or motor in function. The sensory cranial nerves are involved with the senses search as sight smell hearing and touch. Whereas the motor nerves are responsible for controlling the movements and functions of muscles and glands cranial nerves supply sensory and motor information to areas of the head and.

In this module you will learn the basic subdivisions of the vertebrate nervous system. However your focus should be on the cerebral cortex. Along the way you will be challenged to build a digital brain that should help you generate and improve your mental model of the cerebral hemispheres of the human brain.

The 12 cranial nerves are the abducent accessory facial glossopharyngeal hypoglossal oculomotor olfactory optic trigeminal trochlear vagus and vestibulocochlear nerve. The cranial nerve functions are broken up into managing different aspects of your bodys daily tasks from chewing and biting to motor function hearing sense of smell and vision. 13 rows The cranial nerves are composed of twelve pairs of nerves that emanate from the nervous.

The cranial nerves are a set of 12 paired nerves that arise directly from the brain. The first two nerves olfactory and optic arise from the cerebrum whereas the remaining ten emerge from the brain stem. The names of the cranial nerves relate to their function and they are also numerically identified in roman numerals I-XII.

Function of the trigeminal nerve. The sensory functions of the trigeminal nerve are the transmission of impulses for touch pain temperature proprioception and the somatomotor function with mandibular movement. The ophthalmic nerve V1 has mainly sensory fibers and has the following functions.

The 12 cranial nerves and their functions are. Olfactory nerve It controls your sense of smell. Optic nerve It carries visual information from your retina to your brain.

Oculomotor nerve It controls most of your eye movements along with the way. Raise eyelids move eyes regulate the size of pupils focus of lens. 46 extrinsic muscles Trochlear.

Moves eye up and down controlling superior oblique muscles. There are 12 pairs of cranial nerves. They each emerge separately from the brain stem which is the lower part of the brain that links the brain with the spinal cord.

Each cranial nerve has a specific set of functions. Some of the cranial nerves control sensation some control muscle movement and some have both sensory and motor effects. Cranial nerves are the nerves that emerge directly from the brain of which there are conventionally considered twelve pairs.

Cranial nerves relay information between the brain and parts of the body primarily to and from regions of the head and neck including the special senses of vision taste smell and hearing. The cranial nerves emerge from the central nervous system above the level of the first. Number Name Function Location.

Somatosensory information touch pain from the face and head. The Cranial Nerves Can Be Classified as Follows. Cranial nerves I II and VIII olfactory optic and vestibulocochlear nerves go to the sensory organs and they have afferent fibers.

Cranial nerves III IV VI and XII oculomotor trochlear abducens and hypoglossal nerves innervate skeletal muscles of. Figure 1332 The Cranial Nerves. The anatomical arrangement of the roots of the cranial nerves observed from an inferior view of the brain.

Three of the cranial nerves also contain autonomic fibers and a fourth is almost purely a component of the autonomic system. A cranial nerve CN is any of the twelve 12 paired nerves that arise from the lower surface of the brain with one of each pair on each side and pass through openings in the skull to the periphery of the body. 1 The twelve cranial nerves include.

1 olfactory nerve 2 optic nerve 3 oculomotor nerve 3 trochlear nerve 4 trigeminal nerve 5 abducens nerve.