scholarly journals Muscle sympathetic single-unit response patterns during progressive muscle metaboreflex activation in young healthy adults

2020 ◽  
Vol 124 (3) ◽  
pp. 682-690
Author(s):  
Anthony V. Incognito ◽  
Massimo Nardone ◽  
André L. Teixeira ◽  
Jordan B. Lee ◽  
Muhammad M. Kathia ◽  
...  
Keyword(s):  
Single Unit ◽  
Healthy Adults ◽  
Unit Response ◽  
Single Units ◽  
Response Patterns ◽  
Muscle Metaboreflex ◽  
Forearm Muscle ◽  
Single Unit Response

Muscle sympathetic single units respond differentially to sympathoexcitatory stress such that single units can increase firing to contribute to the sympathoexcitatory response or can be nonresponsive or even inhibited. We observed a subgroup of single units that can respond bidirectionally, being first inhibited before activated by progressive increases in forearm muscle metaboreflex activation. These results suggest convergent neural inputs (i.e., inhibitory and excitatory), which yield heterogenous muscle sympathetic single-unit activation thresholds.

Marginal Shell of the Anteroventral Cochlear Nucleus: Single-Unit Response Properties in the Unanesthetized Decerebrate Cat

1997 ◽  
Vol 77 (4) ◽  
pp. 2083-2097 ◽  
Author(s):  
S. Ghoshal ◽  
D. O. Kim
Keyword(s):  
Cochlear Nucleus ◽  
Single Unit ◽  
Unit Response ◽  
Large Majority ◽  
Single Units ◽  
Decerebrate Cat ◽  
Response Properties ◽  
The Core ◽  
Anteroventral Cochlear Nucleus ◽  
Single Unit Response

Ghoshal, S. and D. O. Kim. Marginal shell of the anteroventral cochlear nucleus: single-unit response properties in the unanesthetized decerebrate cat. J. Neurophysiol. 77: 2083–2097, 1997. The marginal shell of the anteroventral cochlear nucleus (AVCN) is anatomically different from its central core. We investigated 38 single units in the shells of 10 cats and contrasted them with 62 single units in the cores of 15 cats. The sites of all shell units were localized with the use of reconstructed electrode tracks. The shell units were divided into acoustically well-driven (68%) and weakly/not-driven (32%) subgroups. The shell units mostly exhibited low spontaneous rates (SRs). Among the well-driven shell units, a large majority (68%) exhibited wide dynamic ranges (≥50 dB) to tones, noise, or both, with some ranges as wide as 89 dB. In contrast, a large majority (80%) of the core units exhibited narrow dynamic ranges (<50 dB) to tones and noise. The poststimulus time histograms (PSTHs) of the well-driven shell units included pause-build (29%), onset (24%), and unusual (33%) types, whereas those of the core units included mainly primary-like (47%) and chopper (29%) types. The excitatory-inhibitory areas (EIAs) of the well-driven shell units included types I/III (47%), III (22%), IV (13%), and II (9%), whereas those of the core units included mainly types III (52%) and I/III (32%). On the basis of Fisher's exact tests, we conclude that the shell and core neural groups of the AVCN are significantly different regarding all of the following physiological characteristics: SR, maximum driven rate, threshold and dynamic range to tones and noise, frequency response area, PSTH type, latency, and EIA type. Wide dynamic ranges of the well-driven shell units suggest that they may play a role in encoding absolute intensity of acoustic stimulus.

Operant Conditioning of Single-Unit Response Patterns in Visual Cortex

Science ◽  
1974 ◽  
Vol 184 (4142) ◽  
pp. 1194-1196 ◽  
Author(s):  
P. G. Shinkman ◽  
C. J. Bruce ◽  
B. E. Pfingst
Keyword(s):  
Visual Cortex ◽  
Operant Conditioning ◽  
Single Unit ◽  
Unit Response ◽  
Response Patterns ◽  
Single Unit Response

scholarly journals Validating a Population Model of Tactile Mechanotransduction of Slowly Adapting Type I Afferents at Levels of Skin Mechanics, Single-Unit Response and Psychophysics

2014 ◽  
Vol 7 (2) ◽  
pp. 216-228 ◽  
Author(s):  
Gregory J. Gerling ◽  
Isabelle I. Rivest ◽  
Daine R. Lesniak ◽  
Jacob R. Scanlon ◽  
Lingtian Wan
Keyword(s):  
Population Model ◽  
Single Unit ◽  
Unit Response ◽  
Type I ◽  
Skin Mechanics ◽  
Single Unit Response

Hearing in Mice by GSR Audiometry: I. Magnitude of Unconditioned GSR as an Index of Frequency Sensitivity

1968 ◽  
Vol 11 (1) ◽  
pp. 159-168 ◽  
Author(s):  
Charles I. Berlin ◽  
Alan Gill ◽  
Martha Leffler
Keyword(s):  
Single Unit ◽  
Response Curve ◽  
Unit Response ◽  
Frequency Sensitivity ◽  
Auditory Systems ◽  
Valid Index ◽  
Fourth Experiment ◽  
Screening Device ◽  
Single Unit Response

Three experiments show that the magnitude of the unconditioned GSR to tones of equal intensity is largest between 10,000 and 20,000 Hz and is a valid index of the frequency sensitivity of the mouse. These findings agree well with cochlear potential findings and single unit response areas, and suggest that the magnitude of the unconditioned GSR might be used as a screening device for frequency sensitivity. A fourth experiment, studying responses of humans to a similar regiment of 100 dB SPL tones, showed a relatively flat response curve unrelated to frequency sensitivity and more closely related to equal loudness contouring. Habituation of the unconditioned GSR in the human was more rapid than in the mouse, suggesting marked differences between the species in either the auditory systems and/or the mechanisms of auditory inhibition and GSR excitation.

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