Experimental Neurobiology

Table 1

Frequency (%, mean ± SD) of VGLUT1+ and VGLUT2+ boutons and percentage of membrane covered by VGLUT1+ and VGLUT2+ boutons on the rat jaw-closing (JC) γ-motoneurons

	JC γ-motoneuron	JOα-motoneuron	JCα-motoneuron
No. of profiles examined (from 4 rats)	24	204	237
Total membrane length examined (μm)	1084.6	3742.1	3934.2
No. of all boutons examined	249	1883	1625
VGLUT1+ boutons
No. of boutons	1	7	59
% of all boutons	0.4 ± 0.7^a	0.9 ± 1.1^a	5.8 ± 0.2^a
% of VGLUT1+ or VGLUT2+ boutons	1.1 ± 2.2^a	2.9 ± 3.6^a	15.2 ± 1.4^a
synaptic covering percentage	0.02 ± 0.04^a	0.7 ± 0.9^a	4.8 ± 0.6^a
VGLUT2+ boutons
No. of boutons	85	333	342
% of all boutons	34.3 ± 1.8	34.7 ± 5.3	32.8 ± 4.1
% of VGLUT1+ or VGLUT2+ boutons	98.9 ± 2.2^a	97.1 ± 3.6^a	84.8 ± 1.4^a
synaptic covering percentage	6.0 ± 0.7^b	19.3 ± 2.9^b	16.3 ± 2.0^b
Total VGLUT1+ or VGLUT2+ boutons
No. of VGLUT1+ or VGLUT2+ boutons	86	340	401
% of all boutons	34.7 ± 1.1	35.6 ± 4.3	38.6 ± 4.1
synaptic covering percentage	6.1 ± 0.7^b	20.1 ± 2.6^b	21.2 ± 2.4^b

“a”

indicates significant difference between JC α-motoneurons and jaw-opening (JO) α-/JC γ-motoneurons (one-way ANOVA, Scheffe’s post hoc test, p<0.05).

“b”

indicates significant difference between JC γ-motoneurons and JO/JC α-motoneurons (one-way ANOVA, Scheffe’s post hoc test, p<0.05). Data on JC and JO α-motoneurons are from our previously-published experiments and are provided for comparison [6].

Exp Neurobiol 2019;28:451~457 https://doi.org/10.5607/en.2019.28.4.451