The police hoped his nerve would break and he'd give himself away. Repolarization definition is - restoration of the difference in charge between the inside and outside of the cell membrane following depolarization. I was a bag of nerves during the interview. It starts within the olfactory lobe and is dispersed to the nasal Clusters of cells that respond to more complex patterns of visual information. nerve. The olfactory nerve is the first cranial nerve. Clusters of cells that respond to more complex patterns of visual information. The motor fibers are mainly involved with the muscles utilized in chewing, Sign in She always suffered from first-night nerves. Serial processing. The olfactory nerve is the first cranial nerve. Medical Definition of nerve impulse. (Myers Psychology 8e p. 227)" Purpose: To determine interocular differences in the retinal nerve fiber layer (RNFL) and optic nerve head (ONH) parameters in a pediatric population using Cirrus high-definition optical coherence tomography (HD-OCT). Psychology news articles are listed below. The nerve that connects the inner ear with the brain. Medical Definition of Neuroplasticity. Blind spot, small portion of the visual field of each eye that corresponds to the position of the optic disk (also known as the optic nerve head) within the retina. : an electrical signal that travels along a nerve fiber in response to a stimulus and serves to transmit a record of sensation from a receptor or an instruction to act to an effector : the propagation of an action potential along the length of a neuron. Sequential processing by two or more processing units. She was in such a state of nerves that she jumped at every noise. From Longman Dictionary of Contemporary English. Learn more here. The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Commonly referred to Sign in Parasympathetic nervous system definition is - the part of the autonomic nervous system that contains chiefly cholinergic fibers, that tends to induce secretion, to increase the tone and contractility of smooth muscle, and to slow heart rate, and that consists of … The next few days would test their nerve to the limit. 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. Neuroplasticity: The brain's ability to reorganize itself by forming new neural connections throughout life. Serial processing. The Auditory Nerve, also known as the Cochlear or acoustic nerve (part of the vestibulocochlear or 8th cranial nerve), is a sensory nerve, it is found in the head and transmits information from the inner ear (cochlea) to the brain in the form of sound (acoustic) energy that impinges on the ear drum (tympanic membrane). Supercell clusters. It starts within the olfactory lobe and is dispersed to the nasal Sign in Show all entries from Topic: Psychology, psychiatry. Nerve net, primitive nerve arrangement forming the entire nervous system of many cnidarians and a part of more advanced nervous systems. This is defined as partial or total hearing loss due to damage in the inner ear. Harrison had an attack of nerves before the match. Methods: Seventy normal Indian children aged 5-17 years presenting to the Pediatric Clinic were included in this observational cross-sectional study. Spinal Cord. nerve1 /nɜːv $ nɜːrv/ S3 W3 noun 1 → nerves 2 body part [ countable] HB MP. 2021 board of directors; 2020 board of directors; 2019 board of directors; 2018 board of directors; 2017 board of directors; mgc calendar; tournaments Damaged hair cells cannot transmit electrical impulses to the auditory nerve … See more. He suffered from nerves and could no longer perform on stage. The optic nerve carries the impulses formed by the retina, the nerve layer that lines the back of the eye and senses light and creates impulses. directs messages to sensory receiving areas in cortex, transmits to medulla. home / medterms medical dictionary a-z list / olfactory nerve definition Medical Definition of Olfactory nerve. The nerve that connects the inner ear with the brain. Psychology definition for Nerve Deafness in normal everyday language, edited by psychologists, professors and leading students. She took a few deep breaths, trying to calm her nerves. acetylcholine. Nerve Deafness. Psychology Definition of TRIGEMINAL NERVE: the fifth and biggest cranial nerve, that houses both sensory and motor fibers. When you feel something, it is because of the electrical signals sent by nerves firing up to your brain and back. Information comes into one end of the cell (the Dendrites) and then goes out the other end (the Axon) so that it can be passed on to another cell. Depolarization is the reversal of charges in a nerve cell that causes it to fire (the positive region becomes negatively charged and vice versa). [ nûrv ] Any of the bundles of fibers made up of neurons that carry sensory and motor information throughout the body in the form of electrical impulses. These single-cell fibers of the sciatic nervemay extend a meter or eve… Help us get better. The human nervous system can be described both by gross anatomy, (which describes the parts that are large enough to be seen with the naked eye,) and by microanatomy, (which describes the system at a cellular level.) They are numbered according to where their nucleilie in the brain stem, e.g. One of its two branches carries the sensation of sound to the brain; the other is involved in maintaining balance. Medical Author: William C. Shiel Jr., MD, FACP, FACR; Neuroplasticity: The brain's ability to reorganize itself by forming new neural connections throughout life. When you feel something, it is because of the electrical signals sent by nerves firing up to your brain and back. ... a branch of psychology concerned with the links between psychology and behavior. In Privacy Policy - Terms of Service. Nerve firing is the electrical current that operates the nervous system. Definition of Psychology: Psychology is the study of behavior in an individual, or group. The 12 pairs of cranial nerves are traditionally abbreviated by the corresponding Roman numerals. Thalamus. "the theory that the spinal cord contains a neurological ""gate"" that blocks pain signals or allows them to pass on to the brain. Her nerves were stretched almost to breaking point as she waited. The nerves conduct impulses toward or away from the central nervous mechanism. 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. Overview. In humans 12 pairs are attached to the brain and 31 pairs to the spinal cord. Similarly, the optic nerve is ensheathed in all three meningeal layers (dura, arachnoid, and pia mater) rather th… : an electrical signal that travels along a nerve fiber in response to a stimulus and serves to transmit a record of sensation from a receptor or an instruction to act to an effector : the propagation of an action potential along the length of a neuron. Depolarization is the reversal of charges in a nerve cell that causes it to fire (the positive region becomes negatively charged and vice versa). These include medications such as Elavil®, Tofranil®, nortriptyline or … Privacy Policy - Terms of Service. Optic nerve: The optic nerve connects the eye to the brain. Consequently, the fibers are covered with myelin produced by oligodendrocytes rather than the Schwann cells of the peripheral nervous system. One of its two branches carries the sensation of sound to the brain; the other is involved in maintaining balance. Neurotransmitters are chemical messengers in the nervous system. Psychology Definition of OPTIC NERVE: the second cranial nerve, that transports the axons of retinal ganglion cells and continues from the retina … The human nervous system can be described both by gross anatomy, (which describes the parts that are large enough to be seen with the naked eye,) and by microanatomy, (which describes the system at a cellular level.) Afferent nerves carry information to the central nervous system, and efferent nerves carry information from the central nervous system to the muscles, organs, and glands. Help us get better. Published by Houghton Mifflin Harcourt Publishing Company. nerve in Psychology, psychiatry topic. Psychology Definition of SCIATIC NERVE: A substantial nerve begins in the lower portion of the spine and passes through the pelvis on its path to the rear of the leg, connecting receptor and The motor fibers are mainly involved with the muscles utilized in … nerves are parts inside your body which look like threads and carry messages between the brain and other parts of the body a condition which affects the nerves in the back trapped nerve British English, pinched nerve American English (=a … Suddenly she was wide awake, her nerves jangling. acetylcholine. AP Psychology Unit 4: Sensation and Perception Extra Definitions. 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