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Muscle spindle



A fusiform mechanoreceptor (specifically a stretch receptor) within the skeletal muscle, composed of a bundle of striated muscle fibers innervated by sensory neurons within a connective tissue sheath. The structure is sensitive to stretch or change in the length of the muscle and is involved in the reflex stretch or automatic regulation of skeletal muscle length.


The muscle spindles are arranged parallel to the muscle fibers. They are responsible for the myotatic reflex or stretch reflex.


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peripheral nervous system

... the stimulus from outside of the organism and ALWAYS controls skeletal muscles; autonomic nervous system ALWAYS receives stimuli from inside of ... So in the patellar reflex, sensory neurons sensing strech in a muscle spindle of a skeletal muscle and motor neurons triggering contraction of ...

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by kk
Fri Mar 20, 2009 12:38 pm
Forum: Physiology
Topic: peripheral nervous system
Replies: 3
Views: 10622

Re: Brain size=IQ level theory (Blacks vs Whites & Asians)

... seen in Europe/Eurasia. The second microcephalin gene, ‘ASPM’ (abnormal spindle like Microcephaly associated), went an episode of positive selection ... penises and testes, failure to go through full normal puberty, poor muscle development, reduced muscle strength, low interest in sex (decreased ...

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by bluecafe669
Tue Apr 15, 2008 12:50 am
Forum: Human Biology
Topic: Brain size=IQ level theory (Blacks vs Whites & Asians)
Replies: 75
Views: 332815

The Fiber Disease

... They did the pioneer work of developing the method recording from muscle afferents such as muscle spindles. This project continued to develop over the years and recruited new collaborators ...

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by Skytroll
Wed Oct 25, 2006 3:14 am
Forum: Human Biology
Topic: The Fiber Disease
Replies: 7403
Views: 6246481


: Muscle spindles are specialised fibres and they act as receptors to the amount of stretch in a muscle. : As they become ...

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by rosebud
Thu Apr 13, 2006 9:15 am
Forum: Human Biology
Topic: Muscles
Replies: 4
Views: 3341

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