Neural gain induced by startling acoustic stimuli is additive to preparatory activation
| Autor: | James R. Tresilian, Welber Marinovic, Aaron N. McInnes, Emily J. Corti, Ottmar V. Lipp |
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| Rok vydání: | 2019 |
| Předmět: |
Adult
Male Reflex Startle medicine.medical_specialty Visual perception Adolescent Cognitive Neuroscience Efferent Experimental and Cognitive Psychology Motor program Stimulation Motor Activity Stimulus (physiology) Wrist Audiology 050105 experimental psychology Young Adult 03 medical and health sciences Neural activity 0302 clinical medicine Developmental Neuroscience Reaction Time medicine Humans 0501 psychology and cognitive sciences Muscle Skeletal Biological Psychiatry Endocrine and Autonomic Systems General Neuroscience 05 social sciences Motor control Middle Aged Biomechanical Phenomena Neuropsychology and Physiological Psychology medicine.anatomical_structure Neurology Auditory Perception Visual Perception Female Psychology Psychomotor Performance 030217 neurology & neurosurgery |
| Zdroj: | Psychophysiology. 57 |
| ISSN: | 1469-8986 0048-5772 |
| DOI: | 10.1111/psyp.13493 |
| Popis: | Loud acoustic stimuli presented during movement preparation can shorten reaction time and increase response forcefulness. We examined how efferent connectivity of an agonist muscle to reticulospinal and corticospinal pathways, and the level of prepared movement force, affect reaction time and movement execution when the motor response is triggered by an intense acoustic stimulus. In Experiment 1, participants executed ballistic wrist flexion and extension movements of low and high force in response to visual stimuli. A loud acoustic stimulus (LAS; 105 dBa) was presented simultaneously with the visual imperative stimulus in probe trials. In Experiment 2, participants executed ballistic wrist flexion movements ranging from 10%-50% of maximum voluntary contraction with a LAS presented in probe trials. The shortening of response initiation was not affected by movement type (flexion or extension) or prepared movement force. Enhancement of response magnitude, however, was proportionally greater for low force movements and for the flexor muscle. Changes in peak force induced by the intense acoustic stimulus indicated that the neural activity introduced to motor program circuits by acoustic stimulation is additive to the voluntary neural activity that occurs due to movement preparation, rather than multiplicative. |
| Databáze: | OpenAIRE |
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