Your cerebral cortex plays a key role in memory, thinking, learning, reasoning, problem-solving, emotions, consciousness and functions related to your senses. It has a wrinkled appearance from its many folds and grooves. Spinal nerves arise from the spinal cord and pass out between the vertebrae there are 31 pairs, 8 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 1 coccygeal. Your cerebral cortex, also called gray matter, is your brain’s outermost layer of nerve cell tissue.
#Auditory nerve psychology definition series
It involves a complex series of steps in which several parts of your ear and auditory nervous system work together harmoniously. As hair cells become activated, they generate neural impulses that travel along the auditory nerve to the brain. There are 12 pairs of cranial nerves, which carry messages to and from the brain. Hearing or auditory processing refers to the awareness of sounds and placing meaning to those sounds. Together, the nerves make up the peripheral nervous system, as distinguished from the central nervous system (brain and spinal cord). This organization begins in the cochlea, where different frequencies tend to cause maximal vibration at different places along the basilar membrane and thus stimulate different hair cells. Mixed nerves are composed of both motor and sensory fibers, and transmit messages in both directions at once. the fundamental principle that different frequencies stimulate different places within structures of the mammalian auditory system. Motor nerves, or efferent nerves, transmit impulses from the brain and spinal cord to the muscles.
Sensory nerves, sometimes called afferent nerves, carry information from the outside world, such as sensations of heat, cold, and pain, to the brain and spinal cord. See Appendix 2-6 and see color plates.ĭepending on their function, nerves are known as sensory, motor, or mixed. A macroscopic cordlike structure of the body, comprising a collection of nerve fibers that convey impulses between a part of the central nervous system and some other body region.
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