Type Ia sensory fiber
Type Ia sensory fiber
Type Ia sensory fiber (pronunciation: /taɪp wʌn eɪ 'sɛnsəri 'faɪbər/), also known as primary sensory afferent fiber, is a type of afferent nerve fiber that is responsible for transmitting the rate of change in muscle length to the central nervous system.
Etymology
The term "Type Ia sensory fiber" is derived from the classification system for peripheral nerve fibers. The "Ia" denotes that these fibers are the largest and fastest conducting among the group I fibers, which are associated with muscle spindle sensory endings.
Function
Type Ia sensory fibers are associated with muscle spindles, which are sensory receptors located in muscles that detect changes in the length of the muscle. They transmit information about muscle length and the rate of change of muscle length to the central nervous system. This information is crucial for maintaining muscle tone and participating in the stretch reflex.
Related Terms
- Afferent nerve fiber: A type of nerve fiber that carries sensory information from the body's periphery to the brain.
- Muscle spindle: A sensory receptor located in the muscle that detects changes in muscle length.
- Central nervous system: The part of the nervous system that includes the brain and spinal cord.
- Stretch reflex: A muscle contraction in response to stretching within the muscle.
See Also
External links
- Medical encyclopedia article on Type Ia sensory fiber
- Wikipedia's article - Type Ia sensory fiber
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