PC1001 Lecture Notes - Lecture 12: Cerebral Cortex, Sensory Neuron, Receptive Field
Document Summary
We need to be able to sense our environments and interpret what. The conscious interpretation of sensations performed mainly by the cerebral cortex. The conscious or subconscious awareness of changes in the external or internal environment. Transduction of a stimulus as a change in energy (mechanical, chemical) into a electrical graded potential. Generation of an action potential in a sensory neuron. Intensity of sensation determined by frequency (number) of aps and number of receptors activated. Each type of sensation is called a sensory modality. Sensory modalities are grouped into either general senses or special senses. Different types of sensory receptors are involved in the different senses: Detect pain, temperature, tickle, itch and some touch. Sensory receptors for some special senses include gustatory receptor cells in taste buds, photoreceptors in the retina of the eye, and hair cells in the inner ear for hearing.
