Effect of Tactile Sensitivity on Two Point Threshold
The skin covers and surrounds the entire human body, making it the largest sensory organ we have. On the skin there are millions of receptors that pick up many different sensations such as touch, pressure, pain and temperature. These receptors are sometimes focused to pick up only one sensation while others can pick up a multitude of sensations at once. These stimuli then get sent to our somatosensory cortex where our brain can process how the skin was touched (Nevid, 2015). However there are some cases in which one receptor’s signal gets overwhelmed by another receptors signal. This means that your brain cannot determine difference threshold between the two receptors. The difference threshold …show more content…
However, in our experiment we will testing both the forearm and calf of the participant to compare the threshold of the two. Our participant will be tested on their ability to sense one or two points on forearm or calf that are being touched by the esthesiometer. The data collected will help us determine the difference threshold (DT) for each body part and see if there is a significant difference between each area of the body. Due to all of the information and studies I have looked at I hypothesize that there will be a significant difference between the DT of the forearm compared to the calf of our …show more content…
Certain things like habitation or expectation could have occurred while performing the trails. Habituation is when the participant becomes aware of stimuli and reports after the threshold. Expectation is similar in that the subject expects the stimuli, and then makes a premature judgment based on it. These things could have occurred during the trails while the participant was waiting for the points to be detected. This is why there only 10 trails per body part. More trail could have been performed to try to get more accurate data, but after sometime habitation or expectation would have occurred and the data would be affected by it. Another issue the accuracy of the measurements. It’s important to start each trail on the same point, however we did not indicate the exact starting point. This most likely didn’t cause that much of an issue, but it’s always something that can hinder the measurements accuracy. Next time it would be better to make a mark of a starting point on each of the body parts
They should also try and figure out if the exit route and entry route the person took were the same. This is a very difficult case for Forensic scientists. There is a lot of evidence that has been tampered with by animals. A lot of the evidence has been washed away by nature and the weather.
Having an image and an altered image switch back and forth with a blank screen in-between set up the study. The blank screen hid the alterations, making it harder for observers to notice the change. There was a control group, who did not receive hints as to where the change was happening in the images, which is the treatment. The other group, the experimental group, did receive hints as to where the change was happening. As predicted, the control group’s results were much lower than the experimenters showing that change can happen even when one is focused on the image and with the smallest disruptions.
One of the variables was using beer and sports drinks. This allowed them to make sure the reaction the participants were having was because of the beer and not just because they were drinking something. Also using different imaging machines was another variable they used. By using two different imaging methods they were able to insure that the recorded activity in the brain was seen in more than one way.
If we were to do this again, I think we would need to ask patients directly and ask more individuals to participate in the observation. If we all compared notes afterwards it would show how accurate our interpretations of patient experience were relative to
In 1977, WM. Abraham attempted to recreate Devries experiment by using both unipolar and bipolar EMG electrodes. The bipolar electrodes would allow for a more precise reading on localized muscle activity while limiting any possible outside interference. Abraham concluded that there were no significant readings of electrical activity in relation to muscle soreness (Abraham 1). A Comparison of both studies would need to be done on the type of equipment used for each experiment which could explain the discrepancy in results.
I would redo this experiment. This is simply based on the conditions of the environment in which the test was conducted. Students that didn 't take part in the test were wondering the hallways. This could have led to a hindrance in patient 's ability to (quickly) identify. Also, the particular hallways I worked in didn 't provide an
The reflex process begins when the tack, or stimulus, makes contact with the integument on the bottom of the foot; this is the arrival of a stimulus. The stimulus’ pathway starts at the epidermis, where it will penetrate all five layers, from the outermost stratum corneum, it travels through the stratum lucidum, stratum granulosum, and stratum spinosum, all the way to the innermost stratum basale. From there, it will continue into the dermis, where there is an extensive network of nerve endings and nerve fibers throughout the two layers of the dermis. The papillary layer contains Meissner’s corpuscles, touch receptors that are sensitive to light touch, which would be able to sense the feeling of the tack making contact with the epidermis. Within the reticular layer are Pacinian corpuscles, touch receptors that can detect deep pressure and vibration, such as the pressure of the tack against the foot.
This test can be inconsistent because sometimes I would answer questions correctly regardless of how they are associated but unconsciously. Because this measured my speed, I would answer the not always with the picture shown, but with the word associated with. For example, if thin individuals and
His apparatus was a chart with hundred individual stimuli which however, were timed and mesured collectively. In order to overcome the list-structure effects that could be arising in the standard Stroop task, the need to present and time individual stimuli was felt. The resulting variation was critical in enhancing the accuracy of results. This further led to studies where the colour and word stimuli were separated and a fixation point was used between the two, creating stronger and more controlled procedures. (eg.
Pain perception and physical injury are terms that relate to pain and pain processing. The purpose of this essay is to offer a description showing evidence that the entirety of ‘perception of pain’ does not solely rely on ‘physical injury’. In order to give this, the essay will try to define these two terms separately. This will include a short description of the pain pathways including certain processes that enables gating of pain perception. There are instances, factors and circumstances that enables gating of pain perception.
99). There are three structures involved in the information processing model; sensory register, short-term store and long-term store (Tangen & Borders 2017, p. 99). The sensory model is a way of attaining information through any of the five senses; smell, sound, taste, sight and touch (Tangen & Borders 2017, p. 101). Most information attained through the senses only lasts for up to three seconds (Tangen & Borders 2017, p. 101). However, if attention is paid to the information, it can be processed to the short-term store/ short term memory (Tangen & Borders 2017, p. 101).