Psychology Definition of NERVE: is a term used to describe a collection of fibres which are found outside the central nervous system, typically sheathed in an insulating material, such Neuroplasticity, also known as neural plasticity, or brain plasticity, is the ability of neural networks in the brain to change through growth and reorganization. NERVE: "There are millions of individual nerves in the human body which support the, Cite this page: N., Pam M.S., "NERVE," in, How to Reduce Swelling (Edema) Quickly after Pregnancy, Intelligence Across the African-American and Latino Cultures, Counseling Children and Adolescents on Death. Activation (firing) of the neuron takes place when the neuron is stimulated by pressure, heat, light, or … The optic nerve is the second of twelve paired cranial nerves but is considered to be part of the central nervous system as it is derived from an outpouching of the diencephalon during embryonic development. The function of a neuron is to transmit information within the nervous system. Nerve, in anatomy, a glistening white cordlike bundle of fibres, surrounded by a sheath, that connects the nervous system with other parts of the body. A neuron is a nerve cell that is the basic building block of the nervous system. Psychology definition for Nerves in normal everyday language, edited by psychologists, professors and leading students. Psychology Definition of OPTIC NERVE: the second cranial nerve, that transports the axons of retinal ganglion cells and continues from the retina on to the optic chiasm. Ulnar nerve weakness may cause you to be unable to hold on to the paper as it is pulled from you or may result in flexion of your thumb as you hold onto the paper, compensating for your weakness. In humans 12 pairs are attached to the brain and 31 pairs to the spinal cord. Define nervous system. The olfactory nerve is the first cranial nerve. Supercell clusters. Definition cells connected to the rods and cones that are activated by the neural signals they producel in turn, these activate ganglion cells that converge to form the optic nerve. Psychology definition for Optic Nerve in normal everyday language, edited by psychologists, professors and leading students. They influence mood, muscle movement, heart rate, and many other functions. Auditory nerve definition, either one of the eighth pair of cranial nerves, consisting of sensory fibers that conduct impulses from the organs of hearing and from the semicircular canals to the brain. is a term used to describe a collection of fibres which are found outside the central nervous system, typically sheathed in an insulating material, such as myelin forming cordlike structures. Habituation is a form of non-associative learning in which an innate (non-reinforced) response to a stimulus decreases after repeated or prolonged presentations of that stimulus. Terms in this set (50) ... make up the optical nerve. Nerve definition, one or more bundles of fibers forming part of a system that conveys impulses of sensation, motion, etc., between the brain or spinal cord and other parts of the body. Similarly, the optic nerve is ensheathed in all three meningeal layers (dura, arachnoid, and pia mater) rather than the epineurium, perineurium, and endoneurium foun… Medical Author: William C. Shiel Jr., MD, FACP, FACR; Optic nerve: The optic nerve connects the eye to the brain. See more. While neurons have a lot in common with other types of cells, they’re structurally and functionally unique. nerve cells in the brain that respond to specific features of the stimulus, such as shape, angle, or movement Parallel processing the processing of several aspects of a problem simultaneously; the brain's natural mode of information processing for many functions, including vision. See more. Neurotransmitters are chemical messengers in the nervous system. Overview. Get the word of the day delivered to your inbox, © 1998-, AlleyDog.com. Neurons communicate with each other as well as with other cells through electric signals (nerve impulses), which in turn allows effector organs to respond to the appropriate stimuli. Medical Author: William C. Shiel Jr., MD, FACP, FACR; Olfactory nerve: The nerve that carries impulses for the sense of smell from the nose to the brain. In vertebrate animals, neurons are the core components of the brain, spinal cord and peripheral nerves. This lesson defines and explains what nerves are as well as associated terminology: neurons, receptors, impulse, stimulus, ascending and descending nerve tracts, ganglion, and plexus. Tinel’s sign is a diagnostic test in which your doctor taps on your nerve in … It can also affect other areas of your body.Your peripheral nervous system sends information from your brain and spinal cord (central nervous system) to the rest of your body. Help us get better. Serial processing. In cnidarians the neurons are joined to epithelial receptors and to contractile cells. The process of converting physical energy into activity in the nervous system is known in sensory psychology as transduction. The outer ear includes the pinna, which is the visible part of the ear that protrudes from our heads, the auditory canal, and the tympanic membrane, or eardrum.The middle ear contains three tiny bones known as the ossicles, which are named the malleus (or hammer), incus (or anvil), and the stapes (or stirrup). The nerves conduct impulses toward or away from the central nervous mechanism. Nerve impulse definition is - the progressive physicochemical change in the membrane of a nerve fiber that follows stimulation and serves to transmit a record of sensation from a receptor or an instruction to act to an effector —called also nervous impulse. Muscle movement, heart rate, and many other functions body, a tree... 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