Lab Report On Sensory Threshold

1041 words - 4 pages

Lab report on Sensory Threshold In this lab the purpose is to test the sensory threshold of a human body. To say it in terms that are easier to understand, we are testing how accurate certain points are on a body with response to touch. We are using three points on the body, the forearm, palm, and index finger. With these three points we will be testing to see how sensitive each point on the body is by measuring the distance of which we can feel one or two points. The part of the brain that allows us to feel, the somatosensory cortex, is mapped out in relation to which parts of the body it processes its touch. Parts of our bodies have different densities of pressure receptors, the densities of these receptors correlates to the amount of brain tissue devoted to processing the somatosensory information. The face for example has a high densities of pressure therefor the somatosensory cortex has a large amount of area for the face, compared to the leg that doesn't have as much pressure receptors, and therefore uses a small area of the somatosensory cortex. (See illustration Fig. 511) With this information about how touch relates to the somatosensory cortex I expect that the index finger will be the point where we are the most sensitive then the palm followed by the forearm. The index finger should be able to detect the smallest distance between pokers than the palm or the forearm.To test the threshold of the human body we took a divider with two sharp points on the end of it. With the pointer we were able to set it to different measurements. We used measurements from .25 centimeters to 4 centimeters with an increment of .25 centimeters. After me measured the distanced out we taped the individual with the point, set to a certain distance, on either ; the forearm, palm, or index finger. The individual then had to decide wether we poke them with ether one or two points. Every once and a while we would tap the individual with one point so that they wouldn't be able to just guess that we were using two points. To keep everything on track we chose one side to do the testing on, and varied the distance of the pointer throughout the experiment and also the location of the tap.After conducting this experiment we compiled all of the data from every PSY 201 lab class and averaged the results together to give us a larger testing group. With the data we took the average of the percent correct for each distance for each position on the body. (see fig 1.1 From the data we noticed that the index finger had the greatest sensitivity with 67% of the answers were correct at .25 centimeters. The forearm seemed to be the next sensitive at .25 centimeters with 22% answering correct. The palm seemed to be the least sensitive at the smallest distance, .25 centimeters, with only 18% getting it correct. In the smallest distance there...

Find Another Essay On Lab Report On Sensory Threshold

Lab Report on Cell viability

761 words - 3 pages PAGE PAGE 6 Lab Report Lab ReportIntroductionCell viability could be referred as the ability of cell to survive. Number of cells present in tissue could be determined by introducing dyes into the cells in the presence of proper light. This method has its important significance in the field of Biology. There are many fluorescent which are used in laboratories; Calcein is a fluorescent dye which is used widely today. Calcein analysis helps in

Lab report on a fischer esterfication

868 words - 3 pages this radiation and reverse their spin and now oppose the applied magnetic field. The frequency of radiation needed to induce spin conversion is a direct function with the strength of the magnetic field. This amount of energy that is needed to induce the change in spin must have a frequency that matches its angular precessional frequency. This is called a resonance condition and this is what is graphically interpreted on a NMR printout.Objective

Botany Lab Report on Cellular Respiration.

2044 words - 8 pages Calibrate Spec 20.1.Turn the Spec-20 and allow it to warm up for 20 minutes.2.Set the wavelength to 600 nm and switch the filter lever to the right.3.Set the mode to transmittance and turn the transmittance knob (the left one) to zero without the blank in the chamber.4.Set the mode to absorbance and place the blank cuvette into the chamber. Make sure the white line on the cuvette is lined up with the arrow on the spectrophotometer.5.Close the lid and

Lab Report: Concentration of Sucrose Affect on Osmosis

1499 words - 6 pages investigating and pour 25cm³ of it into three test tubes and label them test one, two and three. Throw away the remaining 25cm³ of the solution. 4. Place the three test tubes in a test tube rack. 5. Place one potato strip in each test tube and leave in the test tubes for 15minutes. Time the 15minutes using a stopwatch. 6. After 15minutes, remove the potato strips using tweezers and dab them on some tissue to remove excess sucrose solution. 7. Then weigh

Biology Lab Report on the Effects of Photosynthesis

1275 words - 5 pages , Lugol's iodine solution in dropper bottles, 250-mL beakers, 100-mL beakers, tongs, foreceps, Petri dishes, glass-marking pencil, 70% alcoholMethodPART I - Effects Of Light And Dark On Starch FormationThe leaves used for Part I are completely green. A few of these leaves have been entirely and partially covered with black paper two days before the lab. Then the plant was exposed to good light during the day.1. With a glass-marking pencil, label one

Microbiology lab report on Escherichia coli and Staphylococcus aureus.

825 words - 3 pages Microbiology Lab ReportPractica #1BTC307LAmber AmelingmeierThursday, September 18, 2008OBJECTIVESIn this lab experiment two different types of bacteria, Escherichia coli and Staphylococcus aureus, were grown singly and mixed on four different types of agar in order to observe the varying morphologies within the colonies. Resulting data was analyzed to provide understanding of the use of differing culture media and conditions for bacterial

A lab report on the investigation of temperature on catalase activity.

828 words - 3 pages INVESTIGATION INTO THE EFFECT OF TEMPERATURE ON CATALASE ACTIVITYAIMThe aim of this experiment is to find out the effect of temperature on catalase or hydrogen peroxide. This will enable us to tell at what temperature hydrogen peroxide is most efficient. This (degradation) reaction will help us determine some of the catalase's different attributes.HYPOTHESISIn this experiment it would be safe to hypothesise that no activity would take place at 1

The following is a lab report on fermentation and its inhibitors.

950 words - 4 pages shown.2.) Fermentation results in a excess of NADHAccumulation of NADH causes a problem for anaerobes. They have too much of it and itprevents further oxidation of substrate due to a lack of an NAD+ pool to accept electrons.In many fermentation pathways, the steps after energy generation are performed in part toget rid of the NADH.Pyruvate is a valuable intermediate because it can be used for cell synthesis and manydifferent enzymes can act on it

Lab report on gas chromatograph and the optical activity of carvones.

680 words - 3 pages out is a detector which generates a signal that is recorded on a strip chart recorder.Objective and Materials:The materials for this experiment is listed on page 77-82(Organic Chemistry laboratory Manual, Haden/McNeil, 2003-04)Procedure:The procedure for this experiment is listed on page 77-82(Organic Chemistry laboratory Manual, Haden/McNeil, 2003-04)Data:All data is in laboratory notebookCalculations:The following is a calculation optical

This is a chemistry lab report on an Acid-Base Titration experiment.

2736 words - 11 pages , the pH calculated from the results obtained from the Bromothymol blue experiment displayed only +0.307% error from the pH found with the pH meter.There were several other sources of error or inaccuracies in this lab, however the errors of this lab were relatively minor. There is always error in weighing and measuring due to human and instrument limitations. It was hard to get an exact reading on the pH meter because the numbers fluctuated so

This is a lab report studying the effects of common foods on bacteria. Works cited included.

1987 words - 8 pages Introduction Bacteriology is the study of bacteria, especially as it pertains to medicine (Carter 323). Bacteriology is particularly interested in the effects of certain products, potential antibiotics, on bacteria. The purpose of this experiment was to test the effects of common foods, green tea, honey, and garlic, on bacteria, thus discovering if any of the fore stated products have antibiotic qualities. An antibiotic is any product

Similar Essays

Biological Lab Report: The Facial Feedback Hypothesis "The Emotions We Experience Are Also Influenced By Sensory Feedback From The Face?"

2091 words - 8 pages AbstractIn this report I would like to report about the exercise I have performed in week-3 session which test the 'facial feedback hypothesis'. And this hypothesis is an extension of James-Lange theory, which states that the physiological change that we experience in response to a stimulus or an event are in fact our emotions. The facial feedback hypothesis proposes that the emotions we experience are also influenced by sensory feed back from

Lab Report On Serial Communication And Accessing Ibm Comm. Ports

1113 words - 4 pages Lab Report on Serial Communication and Accessing IBM Comm. Ports Lab Title: Serial Communication and accessing IBM comm. ports using DOS and BIOS 1. One of the main differences between serial and parallel communication is the number of wires used to

Lab Report On Measuring The Rate Of Conversion Of Hydrogen Peroxide Using Enzyme Catalysis

866 words - 3 pages Lab Report on Measuring the Rate of Conversion of Hydrogen Peroxide using Enzyme Catalysis In essence, the main objective was to use chemical titration to measure and then calculate the rate of conversion of hydrogen peroxide (H2O2) to water and oxygen by using the enzyme catalase. Other purposes of the lab were; to measure the effects of changes of temperature, pH, enzymes concentration, and substrate concentration on rates of an enzyme. The

College Lab Report On Enzymes

1306 words - 5 pages Lab Ex#8: "Enzymes: Catalysts of Life"INTRODUCTIONEnzymes are protein organelles where chemical reactions take place to generate energy within our cells. Without the energy produced from the cell enzyme activity, we would not possess the catalyst activity necessary for energy to produce movement.Each enzyme performs a specific function within our bodies. Those functions performed can be significantly altered with the introduction of variables