Auditory System (review on your own) Match the correct part of the auditory system with the example. 1. Passage that leads to the eardrum: 2. Vibrates when sound waves hit it, allowing for the movement of air molecules: CS 3. Bone structures in the middle ear that amplify small changes in air pressure: 4. Coiled tunnels, filled with fluid that vibrate in response to sound: 5. Structure in the inner ear that contains hair cells that are the auditory receptors: and are routed through the 6. Sound signals leave the ear through the up in the in the brain. A. Auditory nerve B. Auditory canal C. Auditory cortex D. Thalamus E. Eardrum F. Cochlea G. Hammer, anvil, and stirrup H. Basilar membrane erb no spomi lait leusiv erit to aevier owt er mont derm and enc Tout
Corona Radiata
Corona Radiata is a collection of nerve fibers present in the brain that carries messages between the brain cells of the cerebral cortex and the brain stem. Both brain stem and cerebral cortex play a role in motor function and sensation and it is the corona radiata that links both sensory and motor nerve pathways between these structures.
Neuron Structure
A neuron is defined as the functional unit of the body system called the nervous system. It is significant in transmitting signals that include receiving and sending the signals from a portion of the brain. The neurons are considered specialized cells in terms of their structure.
Afferent Neurons
Neurons are electrically excitable cells in the body specialized for receiving and transmitting information. They are referred to as the structural units of the nervous system. The important parts of a neuron include the cell body, dendrites, and axons.
Motor Homunculus
The term homunculus is Latin and is referred to as ‘little man’. In neuroanatomy, the cortical homunculus is either the motor or sensory distribution along the cerebral cortex of the brain. It was discovered by the great scientist ‘Wilder Penfield and Edwin Boldrey in the year 1937. It is a map that corresponds body part to touch sensitivity. The proportion of the sensory cortex to the size of the body region is irregular. For example, a small area is devoted to sensations that are arising from the trunk, and a large cortical area is devoted to the face and lips.
Nervous System
The nervous system is the portion of an animal's body that controls and transmits signals between various parts of the body. The central nervous system (CNS) and the peripheral nervous system (PNS) are the two primary components of the nervous system in vertebrates. The brain and spinal cord are housed in the CNS. The PNS is made up primarily of nerves, which are long fibers that link the CNS to every other part of the body, but it also includes peripheral ganglia, sympathetic and parasympathetic ganglia, and the enteric nervous system, which is a semi-independent part of the nervous system that regulates the gastrointestinal system.
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