Anatomy and Physiology of Special Sensory Organs
Sensory organs can be labeled as special sensory structures that permit sight, hearing, odor, and flavor. Sensory structures permitting proprioception, touch, thermal, and pain perception can be classified as more advanced sensory organs. The sensory neurons are trained to find out modifications in the external and internal conditions so that a person's body can react to that change. A stimulus is the first signal that is recognized by any sensory receptor of the body. Stimulus is an impulse generated when there is a change in the surroundings of a person. For example, a heated environment will alert the brain through the thermal sensory organs and generate a reflex accordingly.
Sensory Receptors
The human sensory system is one of the most complex and highly evolved structures, which processes a myriad of incoming messages. This well-coordinated system helps an organism or individual to respond to external stimuli, appropriately. The sensory receptors are an important part of the sensory system. These receptors are specialized epidermal cells that respond to external environmental stimuli. These receptors consist of structural and support cells that form the peripheral unit of the receptor and the neural dendrites which receive and detect the external stimuli.
In what way does the overall magnitude of a stimulus
affect the just-noticeable difference in the perception of
that stimulus?
Introduction:
The duration of the impulse varies depending on the degree of the stimulation. Sensory receptors receive these senses. These receptors are in charge of converting inputs into signals and transmitting them to the central nervous system.
The sensory receptors respond to stimuli that are strong enough to cause a threshold potential difference to be generated, this is referred to as sensory sensation. The receptor provides the information to the brain after sensing the stimulation (higher center). The brain decodes the signal. The perception refers to the recognition of a stimulus.' Not all sensations may result in sensory perception.
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