Document Detail

Variability in velocity profiles during free-air whisking behavior of unrestrained rats.
MedLine Citation:
PMID:  18436634     Owner:  NLM     Status:  MEDLINE    
During exploratory behaviors, the velocity of an organism's sensory surfaces can have a pronounced effect on the incoming flow of sensory information. In this study, we quantified variability in the velocity profiles of rat whisking during natural exploratory behavior that included head rotations. A wide continuum of profiles was observed, including monotonic, delayed, and reversing velocities during protractions and retractions. Three alternative hypotheses for the function of the variable velocity profiles were tested: 1) that they produce bilateral asymmetry specifically correlated with rotational head velocity, 2) that they serve to generate bilaterally asymmetric and/or asynchronous whisker movements independent of head velocity, and 3) that the different profiles--despite increasing variability in instantaneous velocity--reduce variability in the average whisking velocity. Our results favor the third hypothesis and do not support the first two. Specifically, the velocity variability within a whisk can be observed as a shift in the phase of the maximum velocity. We discuss the implications of these results for the control of whisker motion, horizontal object localization, and processing in the thalamus and cortex of the rat vibrissal system.
R Blythe Towal; Mitra J Z Hartmann
Related Documents :
19037784 - Behavioral changes in adult rats after prenatal exposures to complex, weak magnetic fie...
10070124 - Central administration of rat il-6 induces hpa activation and fever but not sickness be...
22002084 - Derivation of rat embryonic stem cells and generation of protease-activated receptor-2 ...
2285494 - Dorsolateral connections of the medial preoptic area and maternal behavior in rats.
12018584 - Serotonin and benzylamine oxidation by type a and type b mao of rat brain in presence o...
1266524 - Decarboxylation of s-adenosyl-l-methionine in vitamin b6 deficiency in rat liver.
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2008-04-24
Journal Detail:
Title:  Journal of neurophysiology     Volume:  100     ISSN:  0022-3077     ISO Abbreviation:  J. Neurophysiol.     Publication Date:  2008 Aug 
Date Detail:
Created Date:  2008-08-13     Completed Date:  2008-11-05     Revised Date:  2009-05-15    
Medline Journal Info:
Nlm Unique ID:  0375404     Medline TA:  J Neurophysiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  740-52     Citation Subset:  IM    
Department of Biomedical Engineering, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208-3107, USA.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Behavior, Animal
Exploratory Behavior / physiology*
Functional Laterality
Head Movements / physiology*
Models, Biological
Physical Stimulation / methods
Rats, Long-Evans
Time Factors
Vibrissae / innervation*
Videodisc Recording
Wakefulness / physiology*
Grant Support
F31 NS061488-01A1/NS/NINDS NIH HHS
Comment In:
J Neurophysiol. 2008 Aug;100(2):551-3   [PMID:  18562552 ]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Development of presynaptic inhibition onto retinal bipolar cell axon terminals is subclass-specific.
Next Document:  Probability-based prediction of activity in multiple arm muscles: implications for functional electr...