Sensory Pathway and SNS

Respond to changes in the environment, both internal and external. each receptor is specific to a SPECIFIC stimuli

Area monitored by a specific receptor, the larger the field the less fine tuned the sensation

Awareness of a stimuli, ARRIVING INFORMATION

Interpretation of a meaning of a stimulus, CONCIOUS AWARENESS

Simple comlexity- general sensescomplex- sense organs- visual, hearing smelling and taste.

Reduction in sensitivity in presence of constant stimuli, can be adjusted conscious or subconscious.

Sensory receptors subjected to an unchanging stimulus become less responsive over time. They adapt. (thermoreceptors are an example)

Conscious awareness of a stimulus disappears. this restricts information going to the central nervous systemreduces the reception of the stimulusodors and pain are an example proprioreceptors DO NOT ADAPT

Always activeincrease or decrease in stiulus changees rate of the action potential generation Nociorecpetors are SLOW ADAPTING

Normally active. become active when changes in conditions occur thermoreceptors are FAST ADAPTING

Generate nerve impulses when deformed by touch, pressure, vibration or stretch hair cells are an example of mechanoreceptors 3 classes of mechano receptors tactile receptors- touch pressure vibrationbaroreceptors- detect pressure changes in wall of blood vessels and structures of urinary reporductive and digestive trachtproprioreceptors- monitor body position. no adaptatoin

TactileTONICLarge field, touch and pressure

PHASICmovement of hair

MerkelsTONICsmall field, fine touch

MeisnersPHASICfine touch(mostly)