Afferent systems are the sensory systems that process information coming into the brain. Efferent systems are the motor systems that process information going out from the brain to the muscles and glands. Sensory Processes cont. F. Psychophysics is the study of correlations between physical stimuli and the behavior or mental experiences they evoke. Gustav Fechner was a German was a German physicist who coined the term psychophysics.
Absolute threshold is the minimum amount of physical energy needed to produce a sensory experience.
Difference threshold is the smallest physical difference between two stimuli that can still be recognized as a difference. Sensory Processes cont. G. Sensory adaptation refers to the diminishing responsiveness of sensory systems to prolonged stimulus input. The Neuroanatomy of Vision 1. Structures of the Eye a.