This investigation examined the generalizability of contextual interference to learning the cartwheel in gymnastics. 32 participants ages 17 to 26 years completed five stages of practice of two versions of the skill, one in which the left hand led and one in which the right hand led, providing a total of 192 practice trials. Practice of these two versions of the task was completed in either a blocked or alternating order. Tests of retention and transfer were completed 20 min. and 1 wk. after acquisition. Outcome (errors) and form scores were derived from participants' performance. Alternating practice resulted in poorer acquisition, retention, and transfer per-generalize to this task, a finding which is attributed to task complexity and the interference associated with practicing the two tasks together.
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http://dx.doi.org/10.2466/pms.2003.96.3c.1255 | DOI Listing |
Nat Neurosci
July 2004
Oregon Hearing Research Center and Vollum Institute, Oregon Health & Science University, 3181 SW Sam Jackson Park Road, Portland, Oregon 97239, USA.
In the dorsal cochlear nucleus, long-term synaptic plasticity can be induced at the parallel fiber inputs that synapse onto both fusiform principal neurons and cartwheel feedforward inhibitory interneurons. Here we report that in mouse fusiform cells, spikes evoked 5 ms after parallel-fiber excitatory postsynaptic potentials (EPSPs) led to long-term potentiation (LTP), whereas spikes evoked 5 ms before EPSPs led to long-term depression (LTD) of the synapse. The EPSP-spike protocol led to LTD in cartwheel cells, but no synaptic changes resulted from the reverse sequence (spike-EPSP).
View Article and Find Full Text PDFPercept Mot Skills
June 2003
School of Kinesiology and Recreation, Illinois State University, Normal 61790-5121, USA.
Neuroreport
October 1998
Mental Retardation Research Center, Department of Neurobiology, UCLA Center for Health Sciences, Los Angeles, CA 90024, USA.
Responses to clicks were increased in cartwheel cells of the dorsal cochlear nucleus of cats after pairing presentations of the clicks with local iontophoretic delivery of glutamate. The cells were identified by bursting discharges, and were recorded intracellularly in vivo. The findings indicate that inhibitory interneurons such as cartwheel cells can participate in complex adaptive acoustic signal processing.
View Article and Find Full Text PDFHear Res
May 1995
Surgery Department, University of Rochester School of Medicine and Dentistry, NY 14642-8629, USA.
Calbindin is a 28 kD calcium-binding protein found in neural tissue. Although its functional role in nerve cell physiological processing is still uncertain, previous investigations have suggested that because of its intracellular calcium buffering and regulation properties, it could influence temporal precision of neuronal firing to subserve temporal processing in the auditory brainstem, or could mediate monaural versus binaural coding, or be involved in synaptic plasticity (learning). The present study demonstrates differential calbindin immunoreactivity in the cochlear nuclear complex of the chinchilla, a rodent with exceptionally good low-frequency hearing.
View Article and Find Full Text PDFJ Neurophysiol
May 1993
Department of Neurophysiology, University of Wisconsin, Madison 53706.
1. Intracellular recordings were made from identified cartwheel and stellate cells in the molecular and fusiform cell layers of the murine dorsal cochlear nucleus (DCN). The aim of the study was to identify and characterize their synaptic inputs and to learn how synaptic inputs and intrinsic electrical properties interact to generate firing patterns.
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