Files in this item

FilesDescriptionFormat

video/mp4

video/mp4MovieD1.1.mp4 (3MB)Restricted Access
(no description provided)MPEG-4 video

video/mp4

video/mp4MovieD1.2.mp4 (385kB)Restricted Access
(no description provided)MPEG-4 video

video/mp4

video/mp4MovieD1.3.mp4 (379kB)Restricted Access
(no description provided)MPEG-4 video

video/mp4

video/mp4MovieD1.4.mp4 (1MB)Restricted Access
(no description provided)MPEG-4 video

video/mp4

video/mp4MovieD1.5.mp4 (1MB)Restricted Access
(no description provided)MPEG-4 video

video/mp4

video/mp4MovieD1.6.mp4 (1MB)Restricted Access
(no description provided)MPEG-4 video

Files in this item

FilesDescriptionFormat

application/pdf

application/pdfGIRDHAR-DISSERTATION-2015.pdf (5MB)Restricted Access
(no description provided)PDF

Description

Title:The behavioral space of zebrafish locomotion and its neural network analog
Author(s):Girdhar, Kiran
Director of Research:Chemla, Yann R.; Gruebele, Martin
Doctoral Committee Chair(s):Chemla, Yann R.; Martin Gruebele
Doctoral Committee Member(s):Nelson, Mark E.; Delcomyn, Fred
Department / Program:School of Molecular & Cell Bio
Discipline:Biophysics & Computnl Biology
Degree Granting Institution:University of Illinois at Urbana-Champaign
Degree:Ph.D.
Genre:Dissertation
Subject(s):Zebrafish Swimming
Behavioral Space
Quantitative Behavior
Eigenfish
Neural Model
Abstract:How simple is the underlying control mechanism for the complex locomotion of vertebrates? I explore this question for the free-swimming behavior of zebrafish larvae. A parameter-independent method, similar to that used in studies of worms and flies, is applied to analyze swimming movies of fish. The motion itself yields a natural set of fish “eigenshapes” as axes, rather than the experimenter imposing a choice of coordinates. Three eigenshape coordinates are sufficient to construct a quantitative “postural space” that captures >96% of the observed zebrafish locomotion. Viewed in postural space, swim bouts are manifested as trajectories consisting of cycles of shapes repeated in succession. To classify behavioral patterns quantitatively and to understand behavioral variations among an ensemble of fish, we construct a “behavioral space” using multi-dimensional scaling (MDS). This method turns each cycle of a trajectory into a single point in behavioral space, and clusters points based on behavioral similarity. Clustering analysis reveals three known behavioral patterns—scoots, turns, rests—but shows that these do not represent discrete states, but rather extremes of a continuum. The behavioral space not only classifies fish by their behavior but also distinguishes fish by age. In addition to this, I have quantified escape response behavior of fish to acoustic stimuli. A parameter-free analysis was done on escape response fish movies and free-swimming movie together. The analysis showed a set of three eigenshapes is sufficient to construct the quantitative postural space to observe two different behaviors: ’escape response’ and free-swimming’ on same axes. With the insight into fish behavior from postural space and behavioral space, I construct a two-channel neural network model for fish locomotion, which produces strikingly similar postural space and behavioral space dynamics compared to real zebrafish.
Issue Date:2015-07-14
Type:Thesis
URI:http://hdl.handle.net/2142/88265
Rights Information:2015 Kiran Girdhar
Date Available in IDEALS:2015-09-29
Date Deposited:August 201


This item appears in the following Collection(s)

Item Statistics