BA II SENSATION WHAT IS SENSATION SENSATION IS

BA II SENSATION WHAT IS SENSATION? SENSATION IS THE ACTIVATION OF RECEPTORS IN THE VARIOUS SENSE ORGANS. WHAT IS TRANSDUCTION?

BASIC PRINCIPLES OF SENSORY SYSTEMS • • QUALITY QUANTITY TIMING LOCATION

NATURE OF SENSATION • • • RELATIVELY PASSIVE PARTLY SUBJECTIVE AND PARTLY OBJECTIVE DIFFERENT SENSE ORGANS DIFFERENCE IN INTENSITY RELATED WITH OTHER SENSATIONS

TYPES OF SENSATION • ORGANIC • SPECIAL • KINESTHETIC

VISUAL SENSATION LIGHT – THE PHYSICAL STIMULUS FOR VISION PROPERTIES OF LIGHT § § WAVE LENGTH HUE OR COLOUR BRIGHTNESS SATURATION

STRUCTURE OF THE EYE • • CORNEA IRIS PUPIL LENS RETINA FOVEA BLIND SPOT OPTIC NERVE

WHAT ARE RODS AND CONES? • DARK AND LIGHT ADAPTATION • COLOUR BLINDNESS • VISUAL ACQUITY

VISUAL ACCOMODATION COLOUR VISION PRIMARY, SECONDARY, AND TERTIARY COLOURS THEORIES OF COLOUR VISION • TRICHROMATIC THEORY (HELMHOLTZ) • OPPONENT PROCESS THEORY (HERING) • EVOLUTION THEORY (LAD FRANKLIN) • MCDOUGALL’S THEORY

AUDITORY SENSATION PROPERTIES OF SOUND STRUCTURE AND FUNCTION OF THE EAR • OUTER EAR 1. PINNA 2. EAR CANAL 3. EAR DRUM

• MIDDLE EAR 1. HAMMER 2. ANVIL 3. STIRRUP • INNER EAR 1. VESTIBULE 2. COCHLEA 3. SEMI-CIRCULAR CANALS

THEORIES OF HEARING 1. PLACE THEORY 2. FREQUENCY THEORY 3. VOLLY THEORY

CUTANEOUS SENSATION 1. TOUCH 2. PRESSURE ADAPTABILITY 3. TEMPERATURE TYPES OF RECEPTORS IN THE SKIN GATE CONTROL THEORY OF PAIN ADAPTABILITY

CHEMICAL SENSES A. OLFACTION OLFACTORY RECEPTOR CELLS OLFACTORY BULBS • B. FUNDAMENTAL ODOURS GUSTATION TASTE BUDS THE FIVE BASIC TASTES

• KINESTHETIC SENSE PROPRIOCEPTIVE RECEPTORS VESTIBULAR SENSE