Startle response is dishabituated during a reaction time task
- 1 October 2003
- journal article
- research article
- Published by Springer Nature in Experimental Brain Research
- Vol. 152 (4), 510-518
- https://doi.org/10.1007/s00221-003-1575-5
Abstract
Recent experiments pairing a startling stimulus with a simple reaction time (RT) task have shown that when participants are startled, a prepared movement may be triggered earlier in comparison to voluntary initiation (Carlsen et al. 2003, in press; Siegmund et al. 2001; Valls-Solé et al. 1999). The use of this paradigm in experiments may provide new insights into processes that control rapid voluntary actions. However, because the startle response habituates with repeated exposure to the startling stimulus, its use in experiments may be limited. Previously Brown et al. (1991) and later Siegmund et al. (2001) noted that individuals habituate to a startling stimulus at different rates depending on the required activity level of the participant in the task. The present experiment was designed to determine the rate at which participants habituate to a startle during the completion of a RT task. Participants completed 100 trials in which an active wrist extension to a target was performed as fast as possible following an auditory tone. An unexpected 124 dB auditory startle stimulus accompanied the imperative stimulus in 20 of these trials. For the duration of the experiment, startle response electromyographic (EMG) activity continued to be produced in the sternocleidomastoid muscle (SCM) indicating that habituation was not complete after 20 startle trials. Furthermore RT in the startle condition was significantly shorter than control RT. However, findings indicate that when a measurable EMG burst in the SCM was present, RT was significantly shorter than when no SCM burst was present.Keywords
This publication has 34 references indexed in Scilit:
- Altered Triggering of a Prepared Movement by a Startling StimulusJournal of Neurophysiology, 2003
- Startle response of human neck muscles sculpted by readiness to perform ballistic head movementsThe Journal of Physiology, 2001
- Contextual control of long-term habituation in rats.Journal of Experimental Psychology: Animal Behavior Processes, 2000
- Inhibition of the human startle response is affected by both prepulse intensity and eliciting stimulus intensityBiological Psychology, 1996
- Autonomic, electroencephalographic, and myogenic activity accompanying startle and its habituation during mid‐childhoodPsychophysiology, 1996
- Waiting in readiness: Gating in attention and motor preparationPsychophysiology, 1993
- An Equilibrium-Point Model for Fast, Single-Joint Movement: I. Emergence of Strategy-Dependent EMG PatternsJournal of Motor Behavior, 1991
- NEW OBSERVATIONS ON THE NORMAL AUDITORY STARTLE REFLEX IN MANBrain, 1991
- Effects of the intensity of auditory and visual ready signals on simple reaction time.Journal of Experimental Psychology, 1969
- Effects of success and failure instructions on reaction time in patients with brain damage.Journal of Comparative and Physiological Psychology, 1959