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Single efferent fibers of the interstitial nucleus of Cajal (NIC) were characterized …


Biology Articles » Anatomy & Physiology » Anatomy and Physiology of the Primate Interstitial Nucleus of Cajal. II. Discharge Pattern of Single Efferent Fibers » Table

Table
- Anatomy and Physiology of the Primate Interstitial Nucleus of Cajal. II. Discharge Pattern of Single Efferent Fibers



TABLE 1. Relationship between the discharge of NIC efferent fibers and parameters of ocular movement

 


A.Position Related
Cell Type N kV, spike·s-1·deg-1 r F0, spikes/s CV

Bidirectional
Up 35 3.4 ± 1.5 (0.51-6.9) 0.89 ± 0.12 (0.43-0.99) 97 ± 25 (46-151) 0.09 ± 0.06 (0.03-0.27)
Down 31  -3.0 ± 2.0 (-0.51--10.1) 0.86 ± 0.14 (0.42-0.99) 82 ± 30 (29-142) 0.12 ± 0.07 (0.04-0.32)
Unidirectional
Up 12 3.1 ± 1.1 (1.9-5.0) 0.84 ± 0.14 (0.52-0.99) 74 ± 31 (17-121) 0.16 ± 0.06 (0.11-0.3)
Down 6  -2.4 ± 0.6 (-1.9--3.4) 0.88 ± 0.08 (0.75-0.96) 91 ± 33 (52-131.4) 0.12 ± 0.05 (0.07-0.19)
B.Saccade Related


Cell Type N RV, spikes/deg r ns (N) Bd/Sd, s/s r ns (N) G(Fm/Vm), r ns (N)








spike/s per deg/s

Up 38 0.5 ± 0.3 (0.1-1.4) 0.81 ± 0.11 (0.56-0.97) 0 0.9 ± 0.2 (0.5-1.2) 0.84 ± 0.12 (0.53-0.97) 2 0.45 ± 0.36 (0.1-1.9) 0.71 ± 0.16 (0.33-0.93) 2
Down 27 -0.7 ± 0.5 (-0.2--1.3) 0.75 ± 0.13 (0.52-0.93) 4 0.94 ± 0.2 (0.5-1.2) 0.87 ± 0.1 (0.64-0.99) 0 0.6 ± 0.3 (-0.1--1.0) 0.73 ± 0.13 (0.46-0.92) 11
C.Smooth Pursuit Related


Cell Type N FR/Vsp, spike/s per deg/s r ns (N)





Up 36 0.8 ± 0.4 (0.3-2.1) 0.77 ± 0.15 (0.51-0.95) 12
Down 31 -0.8 ± 0.6 (-0.1--2.2) 0.76 ± 0.16 (0.44-0.97) 14

Values are means ± SD, ranges are in parentheses. N, number of units examined; kV, slope of the rate/position curve; r, regression coefficient; F0, firing rate at primary eye position; CV, coefficient of variation of interspike intervals at primary position; RV, slope of the relationship between number of spikes in the burst and vertical saccade size; ns (N), number of units that did not attain statistical significance (P > 0.05); Bd/Sd, slope of the relationship between burst duration (Bd) and saccade duration (Sd); G(Fm/Vm), slope of the relationship between peak firing rate and peak vertical saccade velocity; FR/Vsp, slope of the relationship between firing rate (FR) and smooth pursuit vertical eye velocity (Vsp).

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