An overview of the five senses that process the information for the human beings

Just so you know, people, there are more than five senses!

An overview of the five senses that process the information for the human beings

In order to define what is "extrasensory" we need to define what is "sensory". Each of the 5 senses consists of organs with specialized cellular structures that have receptors for specific stimuli. These cells have links to the nervous system and thus to the brain.

Sensing is done at primitive levels in the cells and integrated into sensations in the nervous system. Sight is probably the most developed sense in humans, followed closely by hearing. The eye is the organ of vision. It has a complex structure consisting of a transparent lens that focuses light on the retina.

The retina is covered with two basic types of light-sensitive cells-rods and cones. The cone cells are sensitive to color and are located in the part of the retina called the fovea, where the light is focused by the lens.

The rod cells are not sensitive to color, but have greater sensitivity to light than the cone cells. These cells are located around the fovea and are responsible for peripheral vision and night vision.

The eye is connected to the brain through the optic nerve. The point of this connection is called the "blind spot" because it is insensitive to light. Experiments have shown that the back of the brain maps the visual input from the eyes. The brain combines the input of our two eyes into a single three-dimensional image.

In addition, even though the image on the retina is upside-down because of the focusing action of the lens, the brain compensates and provides the right-side-up perception.

An overview of the five senses that process the information for the human beings

Experiments have been done with subjects fitted with prisms that invert the images. The subjects go through an initial period of great confusion, but subsequently they perceive the images as right side up.

The range of perception of the eye is phenomenal. In the dark, a substance produced by the rod cells increases the sensitivity of the eye so that it is possible to detect very dim light.

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In strong light, the iris contracts reducing the size of the aperture that admits light into the eye and a protective obscure substance reduces the exposure of the light-sensitive cells. The spectrum of light to which the eye is sensitive varies from the red to the violet.

Lower electromagnetic frequencies in the infrared are sensed as heat, but cannot be seen. Higher frequencies in the ultraviolet and beyond cannot be seen either, but can be sensed as tingling of the skin or eyes depending on the frequency.

The human eye is not sensitive to the polarization of light, i. Bees, on the other hand, are sensitive to polarized light, and have a visual range that extends into the ultraviolet. Some kinds of snakes have special infrared sensors that enable them to hunt in absolute darkness using only the heat emitted by their prey.

Birds have a higher density of light-sensing cells than humans do in their retinas, and therefore, higher visual acuity. Color blindness or "Daltonism" is a common abnormality in human vision that makes it impossible to differentiate colors accurately. One type of color blindness results in the inability to distinguish red from green.

This can be a real handicap for certain types of occupations. To a colorblind person, a person with normal color vision would appear to have extrasensory perception.

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However, we want to reserve the term "extrasensory perception" for perception that is beyond the range of the normal. The ear is the organ of hearing. The outer ear protrudes away from the head and is shaped like a cup to direct sounds toward the tympanic membrane, which transmits vibrations to the inner ear through a series of small bones in the middle ear called the malleus, incus and stapes.

The inner ear, or cochlea, is a spiral-shaped chamber covered internally by nerve fibers that react to the vibrations and transmit impulses to the brain via the auditory nerve. The brain combines the input of our two ears to determine the direction and distance of sounds.

The inner ear has a vestibular system formed by three semicircular canals that are approximately at right angles to each other and which are responsible for the sense of balance and spatial orientation.

An overview of the five senses that process the information for the human beings

The inner ear has chambers filled with a viscous fluid and small particles otoliths containing calcium carbonate. The movement of these particles over small hair cells in the inner ear sends signals to the brain that are interpreted as motion and acceleration.

The human ear can perceive frequencies from 16 cycles per second, which is a very deep bass, to 28, cycles per second, which is a very high pitch. Bats and dolphins can detect frequencies higher thancycles per second. The human ear can detect pitch changes as small as 3 hundredths of one percent of the original frequency in some frequency ranges.Being Human has been associated with Aseema since June Aseema is a Mumbai based not-for-profit organization that provides holistic and relevant education to Mumbai’s most neglected children – children living on the streets, or in slums and in inhuman conditions.

The rock engraved image to the right is called a fravahar or farohar (also spelt faravahar). Fravahar / farohar/is the modern word for the (united) fravashi.

Thomas Aquinas (/6—) St. Thomas Aquinas was a Dominican priest and Scriptural theologian. He took seriously the medieval maxim that “grace perfects and builds on nature; it does not set it aside or destroy it.”.

René Descartes (—) René Descartes is often credited with being the “Father of Modern Philosophy.” This title is justified due both to his break with the traditional Scholastic-Aristotelian philosophy prevalent at his time and to his development and promotion of the new, mechanistic sciences.

The rock engraved image to the right is called a fravahar or farohar (also spelt faravahar). It is an image found on rock inscriptions and carvings commissioned by the ancient Persian Achaemenian kings. The image is usually portrayed above the image of a king, and the figure in the farohar is identical to the king below in features as well as clothing.

However human’s five senses touch, taste, sight, sound and smell also have their imitations, The Five Sense Organs in Human Beings. The Five Sense Organs in Human Beings The sense organs — eyes, ears, tongue, The role of perception in the decision-making process goes beyond the five senses, touch, sight, smell.

Thomas Aquinas | Internet Encyclopedia of Philosophy