3_14_08 lab

3_14_08 lab - 1 Title: EXPERIMENTS EXPLORING THE PUPILLARY...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Title: EXPERIMENTS EXPLORING THE PUPILLARY REFLEX, TWO-POINT THRESHOLD, ADAPTATION OF SMELL RECEPTORS, VISUAL AID IN BODY COORDINATION, VISUAL BLIND SPOTS, FIELD OF VISION, FIELD OF COLOR VISION AND AFTERIMAGES Abstract: Experiment 3B tested the pupillary reflex. When light was shone in the right eye, the pupil shrank while the left eye’s pupil which did not have light shone shrank slightly momentarily and then returned to normal diameter. Experiment 5A tested the two-point threshold of touch receptors. The index finger had a two-point threshold of 1.5 millimeters. The back of the hand had a two-point threshold of 1 millimeter. The palm of the hand had a two-point threshold of 1 millimeter. It was concluded that less sensitive skin areas had a higher two-point threshold than more sensitive areas. Experiment 6A demonstrated the adaptation of smell receptors and the time required for the receptors to become adapted to the odor. The average time for adaptation for the first odor (clove) was 26 seconds. The average time for adaptation for the second odor (lavender) was 27 seconds. It was concluded that new odors are impossible to detect while smell receptors are adapted. Experiment 7B tested body coordination with and without the aid of visual input. The subject stood on one leg, with both arms out and eyes closed for 10 seconds. With eyes open, the same subject stood for 60 seconds. It was concluded that visual input aids body coordination greatly. Experiment 9C tested for visual blind spots. With one eye open, the object being stared at disappears at a particular distance and then reappears. With both eyes open, the object does not disappear. It was concluded that a lack of photoreceptors at the optic nerve in the back of the eye were responsible for the blind spot. Experiment 10A tested the field of vision. The right eye’s field of vision began at 89° and the left eye’s field of vision began at 101° to make a total range of vision of 190°. Experiment 10B tested for the distribution of cones using colored circles. On the left side: the yellow circle became visible at 92°, the blue circle became visible at 85°, the red circle became visible at 66°, and the green circle became visible at 63°. On the right side: the yellow circle became visible at 95°, the blue circle became visible at 90°, the red circle became visible at 75°, and the green circle became visible at 62°. Experiment 10D tested the concept of afterimages by placing a colored shape on a white
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 4

3_14_08 lab - 1 Title: EXPERIMENTS EXPLORING THE PUPILLARY...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online