spindle


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spindle

 [spin´d'l]
1. a pin tapered at one end or both ends, or something with this shape.
2. the thin, tapering figure occurring during metaphase of cell division, composed of microtubules radiating from the centrioles and connecting to the chromosomes at their centromeres. Called also mitotic spindle.
mitotic spindle spindle (def. 2).
muscle spindle a mechanoreceptor found between the skeletal muscle fibers; the muscle spindles are arranged in parallel with muscle fibers, and respond to passive stretch of the muscle but cease to discharge if the muscle contracts isotonically, thus signaling muscle length. The muscle spindle is the receptor responsible for the stretch or myotatic reflex.
sleep s's bursts of activity of a particular waveform in the electroencephalogram in light or early sleep.

spin·dle

(spin'dĕl),
anatomy, pathology any fusiform cell or structure.
[A.S.]

spindle

/spin·dle/ (spin´d'l)
1. a pin tapered at both ends.
2. the fusiform figure occurring during metaphase of cell division, composed of microtubules radiating from the centrioles and connecting to the chromosomes at their centromeres.
3. a type of brain wave occurring on the electroencephalogram in groups at a frequency of about 14 per second, usually while the patient is falling asleep.

Krukenberg's spindle  a spindle-shaped, brownish-red opacity of the cornea.
mitotic spindle  spindle (2).
muscle spindle  a fusiform end organ arranged in parallel between the fibers of skeletal muscle and acting as a mechanoreceptor, being the receptor of impulses responsible for the stretch reflex.
Enlarge picture
Diagrammatic cross-section of a muscle spindle showing the intrafusal fibers and afferent and efferent endings.
nuclear spindle  spindle (2).
tendon spindle  Golgi tendon organ.

spindle

(spĭn′dl)
n.
1. Biology A cytoplasmic network composed of microtubules along which the chromosomes are distributed during mitosis and meiosis.
2. Anatomy See muscle spindle.

spindle

Etymology: AS, spinel, to spin
1 the fusiform-shaped body of achromatin in the cell nucleus during the late prophase and the metaphase of mitosis. It consists of tiny fibers radiating out from the centrosomes and connecting them with one another.
2 a type of brain wave, consisting of a short series of changes in electric potential with a frequency of 14 per second.
3 any one of the special receptor organs comprising the neurotendinous and neuromuscular spindles distributed throughout the body. These kinds of spindles serve as special receptor organs that detect the degree of stretch in a muscle or at the junction of a muscle with its tendon and are essential in maintaining muscle tone.

spin·dle

(spin'dĕl)
anatomy, pathology Any fusiform cell or structure.
[A.S.]

spindle

A term used adjectivally in anatomy and referring to any elongated cell or structure pointed at both ends. Fusiform.

spin·dle

(spin'dĕl)
In anatomy and pathology, any fusiform cell or structure.
[A.S.]

spindle,

n muscle, a fusiform body lying parallel to and between muscle fibers. It is composed of a conspicuously smaller modified muscle fiber that has its own motor end plate to cause it to contract and its own special sensory end organs (the flower spray ending and the anulospiral ending) that send information to the central nervous system regarding the state of contraction of the main muscle body.

spindle

1. mitotic spindle; the fusiform figure occurring during metaphase of cell division, composed of microtubules radiating from the centrioles and connecting to the chromosomes at their centromeres.
2. muscle spindle.

muscle spindle
a mechanoreceptor found within a skeletal muscle; the muscle spindles are arranged in parallel with muscle fibers. They contain three to 10 small, striated muscle fibers (intrafusal fibers) contained within a capsule and supplied with specialized motor and sensory nerves. They respond to passive stretch of the muscle but cease to discharge if the muscle contracts isotonically, thus signalling muscle length. The muscle spindle is the receptor responsible for the stretch or myotatic reflex.
spindle wood, spindle tree
euonymuseuropaea.
References in periodicals archive ?
In general, definitive CK expression by spindle cells, in the appropriate context, is considered to be sufficient evidence of epithelial differentiation, and in fact, the usefulness of various CKs, in addition to p63, have been well documented in several series of metaplastic breast carcinomas, and hence are not further characterized in this study.
Our 3D observation of metaphase spindles that self-organized in Xenopus egg extracts revealed that spindle shape and microtubule density were constant irrespective of spindle size, whereas spindle size was correlated with the microtubule amount.
The thermal origin errors can be measured by measuring the displacement of a spindle test bar that is assembled in the vertical machining center.
Modern designs of spindle bearings include hybrid ball bearings with steel races and ceramic rolling elements.
By now, a role for microtubules in spindle movements has been found in many systems.
SKF's reconditioning services offer an extremely cost effective 'return to expected performance' of worn or damaged bearings and machine tools spindles.
Brookfield Disposable Thermosel Chambers and Spindles are just part of the Brookfield range of quality instruments and accessories--based on original, proven technology that has set the standards for viscometry measurement and supported by the unique Brookfield repair and calibration service.
According to GTI Spindle president Thomas Hoenig, GTI's new Taylor facility now employs several of the workers who had been at the plant when it was operated under Pope, then a unit of FAG Bearings.
In theory, for example, a researcher could replenish the egg's missing spindle proteins.
With the reduced size of discs, a spindle motor design that used less power (in watts) could be implemented.
The new website features a more user-friendly navigation system and a new spindles Application section that showcases Dynomax's more popular spindles, making it easy to find the right spindle - whether for material removal, robotics, foundry, balancing or custom applications.
size or scope of the contract: MACHINING CENTRE - technical parameters: Line: Drive X-axis 400 - 600 mm Drive Y-axis 300 - 450 mm; Transfer to the Z-axis 250 - 400 mm; Working table: Length of working table 900 - 1 100 mm; Width of the table 300 - 500 mm; Table load a minimum of 220 kg; The width of the grooves - 16 mm spindle: spindle taper ISO 40; Power spindle motor 5 kW - 8 kW; Torque / obr.