WordNet

any of various rotating shafts that serve as axes for larger rotating parts (同)mandrel, mandril, arbor
a piece of wood that has been turned on a lathe; used as a baluster, chair leg, etc.
a stick or pin used to twist the yarn in spinning
(biology) tiny fibers that are seen in cell division; the fibers radiate from two poles and meet at the equator in the middle; "chromosomes are distributed by spindles in mitosis and meiosis"
affecting or characteristic of both neural and muscular tissue

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The vestibular system does not modulate fusimotor drive to muscle spindles in contracting leg muscles of seated subjects.

Bent LR, Sander M, Bolton PS, Macefield VG.SourceDepartment of Human Health and Nutritional Services, University of Guelph, Guelph, Canada.
Experimental brain research. Experimentelle Hirnforschung. Expérimentation cérébrale.Exp Brain Res.2013 Jun;227(2):175-83. doi: 10.1007/s00221-013-3497-1. Epub 2013 Apr 4.
We previously showed that sinusoidal galvanic vestibular stimulation (GVS) does not modulate the firing of spontaneously active muscle spindles in relaxed human leg muscles. However, given that there is little, if any, fusimotor drive to relaxed human muscles, we tested the hypothesis that vestibula
PMID 23552997

Tonic muscle pain does not increase fusimotor drive to human leg muscles: implications for chronic muscle pain.

Fazalbhoy A, Macefield VG, Birznieks I.SourceV. G. Macefield: University of Western Sydney, School of Medicine, Campbelltown Campus, Building 30, Locked Bag 1797, Penrith, Sydney, NSW 2751, Australia. v.macefield@uws.edu.au.
Experimental physiology.Exp Physiol.2013 Jun;98(6):1125-32. doi: 10.1113/expphysiol.2012.071670. Epub 2013 Feb 15.
Experimental pain induced in animals has shown that noxious stimulation of group III and IV afferents increases the firing of muscle spindles via a reflex excitation of fusimotor (γ) motoneurones. Chronic muscle pain has been hypothesized to develop as a result of a vicious cycle involving this mec
PMID 23417691

Intrafusal myosin heavy chain expression of human masseter and biceps muscles at young age shows fundamental similarities but also marked differences.

Osterlund C, Liu JX, Thornell LE, Eriksson PO.SourceDepartment of Odontology, Clinical Oral Physiology, Umeå University, 901 87, Umeå, Sweden, catharina.osterlund@odont.umu.se.
Histochemistry and cell biology.Histochem Cell Biol.2013 Jun;139(6):895-907. doi: 10.1007/s00418-012-1072-7. Epub 2013 Jan 11.
Muscle spindles are skeletal muscle mechanoreceptors that provide proprioceptive information to the central nervous system. The human adult masseter muscle has greater number, larger and more complex muscle spindles than the adult biceps. For a better knowledge of muscle diversity and physiological
PMID 23306907