In this video I explain the process of transduction for taste and how gustatory cells detect tastant molecules in food. I discuss structures of the tongue, including papillae, taste buds, and gustatory cells and consider evolutionary explanations for changes in … Read More
Olfaction: Sense of Smell
In this video I explain the process of transduction for scent; how odorant molecules in the air can trigger different olfactory receptor neurons which then send messages to the rhinencephalon or “nose brain”. I mention the links between scent, emotion, … Read More
Pain Perception
In this video I go into more detail on pain perception. First I discuss the importance of pain as a signal of danger or harm to the body. Next I explain the two types of nerve fibers which carry different … Read More
Touch, Haptic Perception, & the Somatosensory Cortex
In this video I describe touch sensation and haptic perception, which refers to exploring the world by grasping. I outline the types of receptor in the skin including mechanoreceptors, thermoreceptors, and nocireceptors, and then discuss how signals are mapped out … Read More
Vestibular Sense: Balance & Orientation
In this video I describe the parts of the vestibular system and how they use the movement of fluid to communicate information about balance, movement, and orientation. The vestibular sense also incorporates information from other sensory systems and this can … Read More
How Hearing Works: Parts of the Ear
In this video I explain the process of transduction for hearing in order to convert soundwaves into neural activity. I describe each of the parts of the ear and discuss how the movement of fluid in the basilar membrane triggers … Read More
Understanding Colorblindness
In this video I explain different types of colorblindness and what can cause people to have difficulty differentiating colors, either from the lack of a cone type (-anopia) or if the sensitivity of a cone type has been shifted (-anamoly). … Read More
Color Vision: Trichromatic and Opponent Process Theories
In this video I discuss how color vision occurs and explain two important theories for understanding color vision; Young-Helmholtz Trichromatic Theory and Opponent Process Theory. Along the way I describe how some people are able to see ultraviolet (UV) light, … Read More
Photoreceptors, Receptive Fields, and Lateral Inhibition
In this video I go into more detail on the retina, describing the two main types of photoreceptors (rods and cones) and how they operate in different levels of light. Next I describe the composition of receptive fields and how … Read More
Blood Vessels, Floaters, and Blind Spots
In this video I consider several strange aspects of vision such as why we don’t normally see the blood vessels in our eyes, what those odd shapes are that we see when we look at a clear sky, and why … Read More