Description and measurement of circadian rhythms, Computer Graphics

The description and measurement of circadian rhythms.

  • Describe the standard method used for the recording and graphing of behavioral rhythms in animals, especially the use of double-plotted graphs, where the abscissa scale is 48 hours long.
  • Define the general terminology used to describe rhythms, including: circadian, period (tau), phase, phase relationship, nadir, acrophase.
  • Describe how light-dark cycles are manipulated in experiments, and become familiar with the abbreviations used to represent artificial and natural light-dark cycles.
  • Contrast entrained and free-running biological rhythms.
  • Understand that light has been the most reliable zeitgeber, or "time-giver" to life on the planet earth.

An actograph is a graphical representation of sleep/wake patterns.  The darkened bars are the times of activity.  The clear areas are the times of inactivity.  When viewing an actograph, you should view the X and Y axis.  The X axis is also called the abscissa.  If the actograph is single-plotted, there are 24 hours on the x-axis.  If the actograph is double-plotted, there are 48 hours on the X-axis.  The Y axis tells the number of days or hours that the data was collected.  Looking at the graph, you can tell if the organism has an endogenous clock of less than 24 hour or more than 24 hours.  If the graph slants from right to left, there are less than 24 hours in the organism's activity.  If the graph slants from left to right, there are more than 24 hours in the organism's activity. 

Assignment

Three actographs (look closely to see the labels A, B, and C). Assume that the abscissa is either 24 or 48 hours for each actograph. You are asked to write two sentences for each actograph.

First, write a single-sentence description of the actograph, without using any of the special vocabulary you just learned; state what is going on in terms that dear old Mom would understand if you were talking to her on the phone.

Second, write a more technical sentence for each in which you provide a rough estimation of tau (the duration of the period), your understanding or best guess of the labels for the X- and Y-axes, and a statement as to whether each actograph is single- or double-plotted.

Reminder: Your completed assignment will have a total of SIX sentences, two that start out with the words, "In actograph A . . ." etc. Since two of the actographs don't include numerical axes, you will have to make some guesses to complete this assignment.

Posted Date: 3/11/2013 5:17:08 AM | Location : United States







Related Discussions:- Description and measurement of circadian rhythms, Assignment Help, Ask Question on Description and measurement of circadian rhythms, Get Answer, Expert's Help, Description and measurement of circadian rhythms Discussions

Write discussion on Description and measurement of circadian rhythms
Your posts are moderated
Related Questions
Types of Formats It is significant to distinguish among a file format and a codec. Although most audio file formats support merely one audio codec, a file format may assist mul

Question 1 Discuss the overview of multimedia networks Question 2 Discuss the types of synchronization in multimedia system >> Basic synchronization issues Content R

Scan Line Algorithm A scan line algorithm determines the overlap intervals of the polygon with each scan line to obtain interior points of the polygon for assigning those point

Optical Character Recognition Software (OCR) Frequently, you will have printed matter and the other text to incorporate in your project although no electronic text file. Along

Explain the interactive picture construction techniques.    interactive picture- construction methods are commonly used in variety of applications, including design and painting pa

Use DDA algorithm to get the output of your program as shown in Figure ANs: Use DDA( ) function to plot line segments that have end points on diametrically opposite points

what is the opengl code for tcp connection?

2D Clipping Algorithms Clipping is an operation that eliminates invisible objects from the view window.  To understand clipping, recall that when we take a snapshot of a scene,

what is curve clipping

Scientific Visualization This is complex for the human brain to create sense out of the large volume of numbers produced through a scientific computation. Statistical and nume