ansa

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ansa

 [an´sah] (pl. an´sae) (L.)
a looplike structure.
ansa cervica´lis a nerve loop in the neck attached in front and above to the hypoglossal nerve and behind to the upper cervical spinal nerves. Its hypoglossal attachment is misleading since this part of the loop ultimately rejoins the upper spinal nerves. Called also ansa hypoglossi.
ansa of Henle Henle's loop.
ansa hypoglos´si ansa cervicalis.
ansa lenticula´ris a small nerve fiber tract arising in the globus pallidus and joining the anterior part of the ventral thalamic nucleus.
ansa nephro´ni Henle's loop.
an´sae nervo´rum spina´lium loops of spinal nerves joining the anterior spinal nerves.
ansa peduncula´ris peduncular loop: a complex grouping of nerve fibers connecting the amygdaloid nucleus, piriform area, and anterior hypothalamus, and various thalamic nuclei.

an·sa

, gen. and pl.

an·sae

(an'să, -sē), [TA]
Any anatomic structure in the form of a loop or arc.
See also: loop.
[L. loop, handle]

an·sa

, pl. ansae (an'să, -sē) [TA]
Any anatomic structure in the form of a loop or an arc.
See also: loop
[L. loop, handle]

ansa

An anatomical structure, especially neurological, in the form of a loop or arc. From the Latin ansa , the handle of a jug.
References in periodicals archive ?
On May 15, two days before the Sun crossed the ringplane, Struve found: 'The line of ansae perfectly well visible.
A first glance at Fournier's drawing had convinced him that such a feature in terms of perspective would scarcely be visible at the oblique viewing angle that prevailed at the time of observation; unless that is, the 'new' ring extended in the ansae for a considerable distance beyond the extremities of Ring A.
Curiously, Davis's October 8th image captures the anomalous colors near the ansae, but in his December 20th image and Di Sciullo's January 20th image, the red-blue disparity is not oriented east to west but north to south, symmetrical with respect to a line connecting Saturn and the Sun.
It extended almost halfway to the rings' extremities (the ansae, Latin for "handles") before becoming lost in their glare.
This feature, he noted, was fainter than ring C (the so-called crepe ring, discovered in 1850) and seldom equally prominent in both ansae. Significantly, he had no knowledge that such feature had ever been reported before, so the power of suggestion was definitely not at work in this instance.
Observers with access to a stopwatch and an accurate time source can make timings of the various stages: the preceding ansae (tips) of rings A and B, preceding limb of disk, center of disk, following limb of disk, and following ring ansae.
With a 60-mm (2.4-inch) aperture, he could detect the Cassini Division only in the ansae (tips) of the rings, but with the aperture reduced to 50 mm he could no longer make it out with certainty.
The faint extensions or ansae that give NGC 7009 its Saturn-like appearance are not easily visible in scopes less than 10 inches in aperture.
While the rings were easily seen as a thin black silhouette against the planet, I was surprised to see that they were also visible as a thin gray line extending all the way out to the ring's ansae.
Sharp extensions, known as ansae, protrude from the object, creating a major axis nearly 30 arcseconds long.
Despite this powerful visual cue, Herschel failed to follow the outline of this feature off the globe and into the ansae of the rings.
Saturn's dusky C ring was visible in the inner ansae of the rings and crossing the planet's disk.