Paper Clip Lab

In experiment 1, participants were instructed to press a key to determine if the stimulus was red, blue, yellow, or green. On the second half of the experiment, the stimulus appeared in grey with only one colored letter which was positioned randomly. Error rates for the experiment were below 2.5% for each condition, which is quite low. Experiment 2 was the same as experiment 1 except that there were 114 data collections instead of 288 and there were 36 practice trials instead of 72. According to experiment 1 and 2 it is suggested that the effect of

After blindfolding a friend that is seated on the chair with his or her legs positioned one over the other, sound the buzzer before immediately tapping your friend just below his or her knee with the clinical hammer. Wait for 5 seconds before repeating this procedure for 20 to 30 times, making sure in each trial that the buzzer is sounded immediately before the tapping of your friend’s knee. After numerous pairings, it is theoretically possible to observe a reflexive knee jerk even without tapping your friend’s knee, once the buzzer sounds.

During the baseline measurement (Figure 1), when the setup was not actively manipulated, low amplitude, but still clearly visible signals where observed. This suggest that the skin contains receptors which constantly to respond to very subtle changes in the environment. Since the experimental conditions (temperature, air pressure, vibrations of the setup) were relatively stable throughout the baseline measurement, only receptors with a very low threshold of activation could respond. Since then only a relatively few number of primary sensory neurons are excited to the point that they fire APs, the amplitude of the CAPs that were measured were low.

              When doing this experiment, I used my senses of touch and hearing to predict what the

Explain the visual process, including the stimulus input, the structure of the eye, and the transduction of light energy.

* Sensations: The cutaneous sensations like touch, pressure, vibration, pain, cold, hot, etc, are felt by the skin.

The human sense of touch is known as the somatic or somatosensory system. The skin is the biggest and most complex organ in the somatosensory system.The somatosensory system permits the human body to experience pressure, texture, temperature, and pain, and to see the position and development of the body's muscles and joints.The receptor cells in the skin can be separated into three useful classifications: mechanoreceptors that sense pressure and surface, thermoreceptors that sense temperature, and nociceptors that sense pain. Thermoreceptors distinguish changes in temperature utilizing two sorts of receptor cells: warm and cold. Thus, thermoreceptors on the skin detects the temperature signal using two specific receptors cell: warm and cold.

Malcolm states, I can feel him combing, straight back, first the big big comb, then the fine-tooth one. Malcolm can feel the barber combing his head, and his sense of touch tells him how big the comb is, depending on how it feels.It’s evident that the sense of touch does let you know what kind of object is touching you because Malcolm knew what two objects touched him

In this exercise, you examined the effect of increasing stimulus intensity on the nerve. What other stimulus parameter

The Skin has numerous functions as it serves as a protective barrier, regulates body temperatures, controls water retention, and secretes sweat and so on. The anatomy of skin can be broken down into three different layers which include; the epidermis, dermis, and the subcutaneous tissue also known as the hypodermis. The purpose of this paper is to explain the relationship between the layers of skin and friction skin

(Attention) Did you know that there are over 5,000,000 touch receptors in our skin and 3,000 of them are in the finger tips. Imagine all the endorphins being released by the slightest touch of another person.

Somatosensation is the collective sense of touch which enables us to feel our environment through the specialized receptors in our skin. While in primates, the glabrous hairless skin of the hand palm and fingers serves as sensory organ to palpate objects and obtain tactile information, rodents use their whiskers, organized in a series of rows and columns on the whisker pad located on each side of the snout (Fig.X). Rodent whiskers acquire somatosensory information by their deflection onto objects in the environment, like the digits of the human, they obtain information regarding their shape, texture and location. Somatosensation is an active process involving sensory/motor systems, where in humans a hand will press an object of interest in order to feel its textile features, the rodent macrovibrassae (whisker) will position itself in space, scanning the environment in a series of timed protractions and retractions cycles (5-10Hz). The interruption of the whisking cycle caused by the contact of a whisker onto an object provide the necessary spatio-temporal information for the construction of a sensory percept. A whisker touch contains numerous information carried out by the amplitude of the whisker deflection, the direction, duration, accelation/decelaration on contact, frequency of the contact, force along the axial shaft and resonance frequency of the whisker.

sensory receptors in the skin of the area affected kick in to send a message via the sensory nerves

The accuracy with which tactile stimuli can be sensed differs from one area of the body to another and from one individual to another (Purves et al., 2001). The difference in tactile ability across the body surface can be measured by two-point discrimination (Purves et al., 2001). Two-point discrimination (TPD) is the measurement of the cutaneous sensation to distinguish one-point from two-point static touch stimuli (Periyasamy et al., 2008). TPD has been used to evaluate tactile spatial acuity since E. H. Weber published his seminal work on the sense of touch, De Tactu, in 1834 (Tong et al., 2013). TPD helps in diagnosis diseases like Diabetic neuropathy since it is a quantitative and direct measure of sensory loss (Periyasamy et al.,

What is the effect of using your dominate hand vs your non-dominant hand when testing sensitivity? The purpose of answering this question is to help scientists understand if your hand dominance affects your sensitivity. One reason I chose this topic is because I have previously seen a similar experiment in a museum, and I would like to test one of my own. Another reason I chose this topic is because I am very interested in the outcome. I hope to discover if hand dominance influences sensitivity. This project will test your dominant hand vs your non – dominant hand when testing sensitivity.