Startle neural activity is additive with normal cortical initiation-related activation

NEUROSCIENCE LETTERS

卷:558

Article

Maslovat, Dana¹  Carter, Michael J.²  Kennefick, Michael²  Carlsen, Anthony N.² 

[1] Univ British Columbia, Sch Kinesiol, Vancouver, BC V5Z 1M9, Canada

[2] Univ Ottawa, Sch Human Kinet, Ottawa, ON K1P 0A4, Canada

关键词: Additive model;    Initiation;    Motor preparation;    Neural activation;    Startle;   

DOI  :  10.1016/j.neulet.2013.11.009

来源: Elsevier

【 摘 要 】

The current study examined the process of response initiation in a simple reaction time (RT) task using a startling acoustic stimulus (SAS), which has been shown to trigger a prepared movement through an involuntary initiation pathway. The SAS was presented within the RT interval (concurrent with, and 25, 50, 75, 100, and 125 ms following the go signal), with the observed response latency used to examine the relative contributions of voluntary and involuntary activation to response initiation. Our results clearly indicate that both voluntary and startle-related initiation activation jointly contribute to the observed RT. The data support a model in which startle-related neural activity is additive with voluntary cortical initiation-related activation. This result also provides indirect support for the hypothesis that both voluntary and SAS-related involuntary activation involve a similar process of response output. (C) 2013 The Authors. Published by Elsevier Ireland Ltd. All rights reserved.

【 授权许可】

Free