bouton

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bouton

[bü′tōn]
(neuroscience)
A club-shaped enlargement at the end of a nerve fiber. Also known as end bulb.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Muscle 4 NMJs in APP and APP+BACE lines demonstrated a significant (P <0.01) increase in the number of both 1b and satellite boutons per NMJ compared to the control; accordingly, total bouton number per NMJ also increased (Table 1).
In APP and APP+BACE lines, the average number of AZs per 1b bouton was significantly (P <0.01) lower than that in the control, and a similar effect was observed in satellite boutons (Table 1).
Distribution of Brp clusters (AZs) in individual 1b boutons (Figure 2(a)) and corresponding cumulative probability curves (Figure 3(a)) in APP and APP+BACE lines were significantly (P <0.01, Kolmogorov-Smirnov test) shifted towards fewer numbers compared to the control.
A very small fraction of satellite boutons (3% in the control) did not contain AZs at all and presumably could be referred to ghost boutons [26].
To test whether the effects of APP is neuron-type specific or not, a number of confocal images of muscle 6 and 7 NMJs containing both 1b and 1s boutons were analyzed additionally (Figure 4(a)).
The following morphometric parameters of axon terminal fragments were analyzed in ipsilateral S1, S2, PV, PR, and contralateral S1c: density of en passant boutons per millimeter (number of Bp per millimeter, Bpd), density of terminaux boutons per millimeter (number of Bt per millimeter, Btd), total density of boutons per millimeter (BTd: Bpd plus Btd), density of branching points (number of bifurcations per millimeter), density of segments (number of segments per millimeter), average length (total length per segment), index of Bp (number of Bp divided by the total number of boutons) and index of Bt (number of Bt divided by the total number of boutons).
Terminal axon segments bearing boutons were located in all cortical layers, except layer I (Figures 1 and 2).
Interestingly, the total density of boutons appeared to be similar in all target areas (Figure 3B).
According to our results, despite this similarity, intrinsically associated with the density of two types of presynaptic boutons (beaded en passant boutons and stalked terminaux boutons) and the geometry of terminal arbors, the HCA suggested the presence of more than one group of terminals.
Ford offre egalement le nouveau bouton Eco pour les transmissions manuelles et ajuste les parametres du moteur et de l'accelerateur pour plus de sobriete.
"C'est une mouche qui vient des grenadiers, elle te pique et tu attrapes le bouton d'Alep", explique-t-il.
Il n'en fallait pas plus pour faire sortir le PrAaAaAeA@sident Trump de s gonds et lui faire dire qu'il dispose AaAaAeA@galement d'un bouton nuclAaAaAeA@a de surcroit, [beaucoup moins que] beaucoup plus gros et plus puissant [beaucoup plus grand que] que celui de son rival nord-corAaAaAeA@e