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Motor control of rhythmic whisking b...

Berg, Rune Willestofte.

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Motor control of rhythmic whisking by rat.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Motor control of rhythmic whisking by rat./
Author:	Berg, Rune Willestofte.
Description:	106 p.
Notes:	Source: Dissertation Abstracts International, Volume: 64-09, Section: B, page: 4238.
Contained By:	Dissertation Abstracts International64-09B.
Subject:	Biophysics, General. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3104049
ISBN:	0496516171

Motor control of rhythmic whisking by rat.
Berg, Rune Willestofte.

Motor control of rhythmic whisking by rat. - 106 p.

Source: Dissertation Abstracts International, Volume: 64-09, Section: B, page: 4238.

Thesis (Ph.D.)--University of California, San Diego, 2003.

In this thesis I focus on the motor control of the rat mystacial vibrissa. I ask the following questions. (1) Are there more than one set of muscles involved in the rhythmic movement (whisking) of the vibrissae, in particular, are the extrinsic muscles involved in the retraction phase? (2) What is the role of vibrissa primary motor cortex (M1) in this movement and can single stimuli in M1 evoke whole sweeps? (3) Does the control of M1 on the whisking, i.e. the impact of electrical stimulation in M1, depend on the state of arousal of the awake animal? (4) The brain region called the basal forebrain (BF) has extensive cholinergic projections to M1, what is the role of this region with respect to the output from motor cortex?

ISBN: 0496516171Subjects--Topical Terms:

1019105
Biophysics, General.

Motor control of rhythmic whisking by rat.
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035 $a (UnM)AAI3104049
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040 $a UnM $c UnM
100 1 $a Berg, Rune Willestofte. $3 1925957
245 1 0 $a Motor control of rhythmic whisking by rat.
300 $a 106 p.
500 $a Source: Dissertation Abstracts International, Volume: 64-09, Section: B, page: 4238.
500 $a Chair: David Kleinfeld.
502 $a Thesis (Ph.D.)--University of California, San Diego, 2003.
520 $a In this thesis I focus on the motor control of the rat mystacial vibrissa. I ask the following questions. (1) Are there more than one set of muscles involved in the rhythmic movement (whisking) of the vibrissae, in particular, are the extrinsic muscles involved in the retraction phase? (2) What is the role of vibrissa primary motor cortex (M1) in this movement and can single stimuli in M1 evoke whole sweeps? (3) Does the control of M1 on the whisking, i.e. the impact of electrical stimulation in M1, depend on the state of arousal of the awake animal? (4) The brain region called the basal forebrain (BF) has extensive cholinergic projections to M1, what is the role of this region with respect to the output from motor cortex?
520 $a I report that at least two muscles are involved in exploratory whisking, where the intrinsic muscles produce the protraction and the extrinsic muscles produce the retraction of the vibrissae, and I include precise quantification of phase, frequency probability distribution, amplitude, spectral fidelity and the impact of sensory deafferentation, which lowers the average frequency by about 1 Hz. Single stimuli in motor cortex can produce full sweeps of vibrissa motion and the movement can follow stimulation frequencies up to >20 Hz, which suggest that M1 can in principle subsume control over each cycle of movement. The effect of the M1 stimulation was highly dependent on arousal of the animal, which I quantified by the spectral signatures of the hippocampal activity. Furthermore, stimulation in the basal forebrain had a strong facilitative effect on the stimulation in M1, which suggest that BF has a modulatory role on the motor cortical output. These findings all together, may have great importance in neural prosthetics and help understanding sensory and motor processes.
590 $a School code: 0033.
650 4 $a Biophysics, General. $3 1019105
650 4 $a Biology, Animal Physiology. $3 1017835
690 $a 0786
690 $a 0433
710 2 0 $a University of California, San Diego. $3 1018093
773 0 $t Dissertation Abstracts International $g 64-09B.
790 1 0 $a Kleinfeld, David, $e advisor
790 $a 0033
791 $a Ph.D.
792 $a 2003
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3104049