nuclear bag fiber


nuclear bag fiber
an intrafusal fiber that contains a nuclear bag; it is longer and thicker and contracts more slowly than a nuclear chain fiber.

Medical dictionary. 2011.

Look at other dictionaries:

  • Nuclear bag fiber — Latin myofibra sacculiformis Code TH H3.03.00.0.00013 A nuclear bag fiber is a type of intrafusal muscle fiber that lies in the center of a muscle spindle. Each has a large number of nuclei concentrated in bags and they cau …   Wikipedia

  • Nuclear chain fiber — A muscle spindle, with γ motor and Ia sensory fibers Latin myofibra catenaformis Code TH …   Wikipedia

  • nuclear chain fiber — an intrafusal fiber that contains a nuclear chain; it is shorter and thinner and contracts more rapidly than a nuclear bag fiber …   Medical dictionary

  • bag fiber — nuclear bag f …   Medical dictionary

  • nuclear bag — the central portion of the central or equatorial segment of intrafusal fibers of muscle; it is usually devoid of obvious cross striations and contains an accumulation of 40 to 50 spherical nuclei, which completely fill and often slightly distend… …   Medical dictionary

  • Fiber — The parts of plants that cannot be digested, namely complex carbohydrates. Also known as bulk or roughage. Complex carbohydrates from plants are rich in starch and fiber. Examples of plants that provide complex carbohydrates (fiber) are fresh… …   Medical dictionary

  • bag — A pouch, sac, or receptacle. [A.S. baelg] Ambu b. proprietary name for a self reinflating b. with nonrebreathing valves to provide positive pressure ventilation during resuscitation with oxygen or air. breathing b. a collapsible reservoir from… …   Medical dictionary

  • Type Ia sensory fiber — also called Primary Afferent Fiber is a type of sensory fiber. It is a component of a muscle fiber s muscle spindle which keeps track of how fast a muscle stretch changes (the velocity of the stretch).Function of muscle spindlesIn order to… …   Wikipedia

  • Type II sensory fiber — (group Aβ) is a type of sensory fiber, the second of the two main groups of stretch receptors. They are non adapting, meaning that they keep responding even when the muscle has stopped changing its length. They are the second most highly… …   Wikipedia

  • Nerve fiber — Latin neurofibra MeSH Nerve+Fibers Code TA A14.0.00.001 A nerve fiber is a threadlike extension of a nerve cell and consists of an axon …   Wikipedia


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