Our objective for this lab was to learn more about the distribution and capabilities of sensory cells. In Table 1, the mean for the angle stimulus detected was 78° and the mean for the angle color detected was 58°. The results from the table indicated that I was able to detect an object was near before I was able to detect the color of the object. Being able to detect an object before detecting the objects’ color could be explained by the type of photoreceptors located in the center and periphery of the retina. Based on my results from Table 1, I was able to conclude that the photoreceptor that is most common in the center of my eye is cone cells. I was able to conclude this due to the mean angle to which color was detected. Thus, the photoreceptor most common in the periphery would be the rod cells. …show more content…
Out of the five trials, four of trials were successful. The results from my data can best be explained by interaural time difference (difference in arrival time) and interaural level differences (sound volume). Based on my results in Table 2, I can conclude that my interaural level differences help me to determine the direction of the sound source to obtain a successful toss. Also, during the five trials, I did not have a set pattern to which I used the earplugs. However, I can conclude that I did get better after the second trial due to more practice. In the future, to rule out the cofound performance effect I could make the experiment more randomize by using one earplug instead of two at a
Barlow (1953) first postulated the existence of feature-sensitive ganglion cells in a frog’s retina based on an inhibitory-surround structure of the receptive field. He maintained that the “on-off” units of these cells triggered by the presence of a particular stimulus corresponded to certain behaviour in the frog. For example, presenting a spot of light in the visual field would cause certain neurons to fire in a particular ganglion cell, and in a live frog, would cause the frog to snap at the stimulus. Barlow concluded that these cells must be “fly detectors”. Lettvin et al. (1959) further examined the visual mechanisms of the frog and discerned fo...
Purpose- To identify the functions of the cranial nerve of the peripheral nervous system such as the olfactory, optic, oculomotor, trochlear, trigeminal, abducens, facial, vestibulocochlear, glossopharyngeal, vagus, accessory, and the hypoglossal nerves. I will examine these functions with a series of behavior tests on my partner who is Jazmine Cooley to see if all nerves are functioning properly and if they are not, then this will be considered an identified dysfunction of a cranial nerve which is a diagnosis.
Because it is a way of knowing the pressure that the blood is putting on the walls of arteries and veins.
Thyroid and metabolism hormones play a large role in the daily lives of all living species. Thyroid hormones regulate the metabolism and the metabolism is responsible for maintaining a specific range for the biochemical reactions that occur in the body (Martini 2014). The most important hormone for metabolic maintenance is thyroxine (T4). This hormone also plays a large role in body heat regulation. It is produced by the pituitary gland and secreted by the thyroid gland. The thyroid releasing hormone (TRH) must trigger the thyroid stimulating hormones (TSH) to release thyroid hormones to the thyroid gland. These hormones are under control of the hypothalamus, or main neural control center. Propylthiouracil (PTU) is a medication used to treat
Hubel and Wiesel defined the classic receptive field as a restricted region of the visual cortex. If a specific stimulus fell into this area, this may drive the cell to evoke action potential responses (Zipser, Lamme & Schiller, 1996). By shining orientated slits of light into the cat’s eye, they were able to discover that each cell had its own specific stimulus requirements (Barlow, 1982). Different cells differed from each other in many ways; some preferred a spe...
The eye is an important sensory organ for vision which houses a sensitive optical apparatus in a relatively isolated tissue compartment. Eye is essentially made of three layers: (1) sclera, (2) uveal tract, and (3) retina with each of these layers performing intricate duties which ensure proper functioning of the eye.
The effects of perceptual load on the occurrence of inattentional blindness were demonstrated clearly by experiment. In an experiment conducted by Finch and Lavie in 2007, participants were given identical series of central cross-targets with two arms of clearly different color (blue and green) and slightly different length. Participants were split in two groups, one performing an easy task (low load condition) and the other a harder task (high load condition). The group performing the easiest task only had to make color discrimination between the tw...
In this lab we apply the technique known as a two point discrimination test. This test will allow us to determine which regions of the skin are best able to discriminate between two simultaneous sensory impulses. According to (Haggard et al. 2007), tactile discrimination depends on the size of the receptive fields located on the somatosensory neurons. However receptive fields for other types of sensations are located elsewhere. For vision we find that the receptive fields are located inside the visual cortex, and for hearing we find receptive fields in the auditory cortex. The ability for the body to discriminate two points depends on how well that area of the body is innervated with neurons; and thus conferring to the size of the receptive fields (Haggard et al. 2007). It is important to note that the size of the receptive field generally decreases in correlation to higher innervations. As was seen in the retinal receptive fields, the peripheries of tissue had contained larger receptive fields (Hartline, 1940). In our test we hypothesized that the finger region will be able to discriminate better than the forearm. This means that they will be much more innervated with neurons than the forearm, and likewise contain smaller receptive fields. This also means that convergence is closer to a 1:1 ratio, and is less the case the farther from the fingers we go. We also think that the amount of convergence is varied with each individual. We will test to see if two people will have different interpretations of these results.
The retina contains rods and cones which detect the intensity and frequency of incoming light and, in turn, send nerve impulses to the brain.
Humans have 3 cones in their retina. A cone is a photoreceptor cell that is primarily responsible for visual acuity or sharpness that determines how well we see and also detect color. Dogs have only 2 cones. They do not have the red photoreceptor cone which becomes a reason for them to perceive shades of red as shades of yellow. The hues of a color (for example: light yellow and brownish yellow) is a discriminating factor for canines to identify two objects
Color Vision Development in Infants: The Responsibility of Cone Types and Wavelength in Order of Color Development
Although discovered in 1839, Binaural Beats are still a relatively unknown concept to most doctors of rehabilitation or therapy (Manley 1) .The term Binaural Beats is given to the phenomenon in which two tones of very slightly differing frequencies are presented to a subject wearing headphones, the effect of the similar tone...
Visual Discrimination is “using the sense of sight to notice and compare the features of different items to distinguish one item from another” (NCLD Editorial Team, 2014) http://www.ncld.o...
The Cell, the fundamental structural unit of all living organisms. Some cells are complete organisms, such as the unicellular bacteria and protozoa, others, such as nerve, liver, and muscle cells, are specialized components of multicellular organisms. In another words, without cells we wouldn’t be able to live or function correctly. There are Animal Cells and Plant Cells. In Biology class the other day we studied the Animal Cell. We were split into groups of our own and we each picked a different animal cell slide to observe. My group chose the slide,'; Smeared Frog Blood ';.
One sub-system under the sensory system is the visual system; the main sense organs of this are the eyes. The eye is the sensory organ that allows us to detect light from external stimuli. When a light ray is detected, the eye converts these rays into electrical signals that can be sent to the brain in order to process the information and giv...