Sensation and Perception
SENSATION AND PERCEPTION * One of the basic processes in the interaction of man and his environment that governs the reception of information. * Man must be able to sense, interpret, and respond to various events and stimulations.
The study of reception and function of stimulation may be divided into two parts: * Sensation – considers the mechanism of receiving information * Perception – considers the received information and past experiences.
SENSATION
* Sensations that can be relayed or discriminations it can make to adjust its behavior according to the sensory messages it receives. * There are two factors which are necessary for sensation to occur: * There must be stimulus. * There must be receptors that are sensitive to the stimulus.
According to Kagan, a stimulus is any form of energy capable of exciting the nervous system like light waves, sound waves and the chemical energy that causes the sensation of taste and smell.
The receptor is a specialized nerve ending capable of responding to energy.
The mechanism that converts stimulus energy into neural energy are called the senses.
There are five primary senses: * Vision * Hearing * Smell * Taste * Skin senses
In addition we have: * The sense of equilibrium * Kinesthesis * Organic sense
Vision * EYE * Sense organ of vision * Sense of sight * Arranged like a camera to focus on light reflected from or generated by objects outside the body onto a sheet of receptor cells. * Sense objects and then convey the information to the brain. * Visual perception takes place * The stimulus for vision comes in the form of electromagnetic waves.
Structure of the eye
3 Coats of an Eye
Sclera- outer coat
Choroid Coat- middle layer
Retina-inner layer
Sclera
* Tough opaque layer of connective tissue used to protect the inner structures of the eye. * Helps maintain the shape of the eyeball.
The study of reception and function of stimulation may be divided into two parts: * Sensation – considers the mechanism of receiving information * Perception – considers the received information and past experiences.
SENSATION
* Sensations that can be relayed or discriminations it can make to adjust its behavior according to the sensory messages it receives. * There are two factors which are necessary for sensation to occur: * There must be stimulus. * There must be receptors that are sensitive to the stimulus.
According to Kagan, a stimulus is any form of energy capable of exciting the nervous system like light waves, sound waves and the chemical energy that causes the sensation of taste and smell.
The receptor is a specialized nerve ending capable of responding to energy.
The mechanism that converts stimulus energy into neural energy are called the senses.
There are five primary senses: * Vision * Hearing * Smell * Taste * Skin senses
In addition we have: * The sense of equilibrium * Kinesthesis * Organic sense
Vision * EYE * Sense organ of vision * Sense of sight * Arranged like a camera to focus on light reflected from or generated by objects outside the body onto a sheet of receptor cells. * Sense objects and then convey the information to the brain. * Visual perception takes place * The stimulus for vision comes in the form of electromagnetic waves.
Structure of the eye
3 Coats of an Eye
Sclera- outer coat
Choroid Coat- middle layer
Retina-inner layer
Sclera
* Tough opaque layer of connective tissue used to protect the inner structures of the eye. * Helps maintain the shape of the eyeball.