Mode of sensation is transmitted by design of receptor
Intensity of stimulus is transmitted by firing rate of action potentials
Duration of stimulus is transmitted via rapidly and slowly adapting receptors
Rapidly fire when intensity of stimulus is changing
Slowly adapting inform on maintained stimulus
Senses stretch – change in length of muscle
Informs brain of joint position – proprioception
Tonic muscle tone
Visual signals are transmitted from the retina to the visual area of the thalamus.
Different cell populations are responsible for interpreting form and motion.
Visual information is transmitted to other areas of the cortex and integrated with other
E.g. edge detection cells
Vestibular afferents provide information to the CNS about linear and angular acceleration
of the head.
Important for staying upright, protecting the head
The utricle and saccule detect linear acceleration.
The semicircular canals detect angular acceleration.
Filled with viscous fluid (endolymph)
The hair cells detect movement of surrounding fluid.
Defection → depolarization
Complex patterns of sensory information are transmitted via the eighth cranial nerve and
integrated in the cerebellum and other sensory areas. Vestibulo-ocular reflexes enable constant eye positions during head movements.