کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9406465 | 1613004 | 2005 | 14 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Hippocampal theta activity related to elicitation and inhibition of approach locomotion
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علم عصب شناسی
علوم اعصاب رفتاری
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Hippocampal theta activity related to elicitation and inhibition of approach locomotion Hippocampal theta activity related to elicitation and inhibition of approach locomotion](/preview/png/9406465.png)
چکیده انگلیسی
This study determined if the hippocampal theta rhythm showed phase relationships or changes in amplitude and frequency with the onset of stimuli and locomotion in a task in which auditory cues initiated and suppressed approach locomotion. Rats with electrodes in the dorsal hippocampus lapped at a milk dipper and were presented a tone which predicted the delivery of a food pellet. In some trials the pellet cue tone was negated by 60-Hz clicks beginning 0.3Â s after onset, and no pellet was delivered. A video capture system (20-ms sampling) synchronized to the hippocampal recording system (10-ms sampling) was used to determine the onset of locomotor approach to the pellet area. The findings failed to support proposals that phase-related mechanisms play a role in encoding and retrieval of movement-related information. Neither the pellet cue nor the negating cue reset the theta rhythm, and they did not produce differential evoked potentials. During milk lapping, theta amplitude increased in the 1/2Â s prior to all pellet cues regardless of their locomotor effect. Frequency also rose but only when a non-negated pellet elicited short-latency locomotion. During locomotor execution, theta peak amplitude peaked earlier than theta frequency by approximately one period. In general during performance of this task, increasing theta amplitude reflected a general preparation to process the cue and increasing theta frequency reflected the readiness to respond to the cue with locomotion.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Behavioural Brain Research - Volume 160, Issue 2, 28 May 2005, Pages 236-249
Journal: Behavioural Brain Research - Volume 160, Issue 2, 28 May 2005, Pages 236-249
نویسندگان
Harry M. Sinnamon,