Nuclear bag fiber

From Wikipedia, the free encyclopedia

1 to 3 nuclear bag fibres lie in the centre of each intrafusal muscle fibre of a muscle spindle. Each has a large number of nuclei concentrated in bags and they cause excitation of both the primary and secondary nerve fibres.

[edit] See also

• nuclear chain fiber.

[edit] External links

• http://www.unmc.edu/Physiology/Mann/mann11.html

v • d • e Nervous system, receptors: somatosensory system Medial lemniscus Touch/mechanoreceptors: Pacinian corpuscles – vibration • Meissner's corpuscles – light touch • Merkel's discs – pressure • Ruffini endings • Free nerve endings – pain • Hair cells • Baroreceptor Proprioception: Golgi organ – tension/length • Muscle spindle – velocity of change (Intrafusal muscle fiber • Nuclear chain fiber • Nuclear bag fiber) Spinothalamic tract Pain: Nociception and Nociceptors Temperature: Thermoreceptors