Cranial nerves and their functions pdf
Spinal Nerves PowerPoint Can function with the brain Can function independently of the brain The brain Integrates and processes information Can function with the spinal cord Can function independently of the spinal cord Continuous with the cranial (cerebral) meningesAlthough the cranial nerves and their sensory and parasympathetic ganglia (Tables 15. 1, 15. 2) form part of the functions of the cranial nerves. OLFACTORY NERVE (CN I) The bipolar olfactory receptor cells the middle cranial fossa. There, the optic nerves of the right and left sides join each other to form the optic chiasma cranial nerves and their functions pdf
THE CRANIAL NERVES The twelve pairs of cranial nerves are continuous with the brain and are numbered from anterior to posterior, according to their attachments to the brain. CNI is attached to the cerebral hemispheres. CNII is attached to the central cerebrum via the optic chiasma (hypothalamus), CNIII and IV to the midbrain.
As in the case of spinal nerves which are named based on their origin from the spinal cord, cranial nerves derived their name from their close association with the cranium. The holes or openings in the skull serve as their passage to reach their targets throughout the human body. Cranial Nerves# Name Function I Olfactory S Smell II Optic S Vision III Oculomotor M Move eyeball, lens, pupil, and eyelids IV Trochlear M Move eyeball cranial nerves and their functions pdf Cranial Nerve 9 (Glossopharyngeal N) Innervates the parotid gland (salivation) Sensation from the carotid artery to control blood pressure and fluid balance (carotid body and carotid sinus innervation) Sensation from the Posterior 13 of the tongue Skin of the external ear Inner surface of tympanic membrane (ear drum) Taste from the posterior 13 of the tongue
Jul 02, 2017 List Of 12 Cranial Nerves& Their Functions. As stated above, there are 12 cranial nerves. These cranial nerves are: Olfactory Nerve. As the name itself suggests that this nerve deals with the sense of smell. The receptors of these nerves are located in the nasal mucosa. This is the shortest nerve among all of the cranial nerves and it does not cranial nerves and their functions pdf A few years ago, a colleague taught me a much easier way to remember the cranial nerves and their locationsby drawing a face and using numbers as the facial features. Each number represents one of the 12 cranial nerves, and the placement of the numbers represents the location of Introduction to the Cranial Nerves. The cranial nerves appear in pairs at the bottom surface of the brain. Their functions vary, but main functions include muscle control, helping the brain interpret the five senses, and controlling glands in the human body. Each cranial nerve pair controls specific functions of the human body. Objective: To understand the organization of cranial nerves with respect to their nuclei within the brain, their course through and exit from the brain, and their functional roles. The MOTOR or EFFERENT fibers of cranial nerves arise from groups of neurons in the brain, which are their nuclei of origin. The SENSORY or AFFERENT fibers of the nerves arise neurons situated outside the brain, grouped to form ganglia or sited in peripheral sensory organs. Their processes enter the brain and grouped to form nuclei of termination.Rating: 4.85 / Views: 838