How humans perceive bitter taste, and the evolution of taste perception.
Understanding the neural circuits in the spinal cord that control movement.
In four talks, A. James Hudspeth, MD, PhD, and Jeremy H. Nathans, MD, PhD, discuss how sensory information is encoded and transmitted to the brain. They describe the detailed workings of two senses of great importance to humans—vision and hearing.
Dr. Hudspeth will begin by discussing how simple organisms—such as bacteria—have the capacity to detect and react to a stimulus.
Dr. Nathans will discuss how the visual process involves the detection of light by photo-receptors in the retina.
Dr. Hudspeth will explain the basis for the ear’s remarkable ability to detect sound through the hair cell, the sensory receptor found in the inner ear.
Dr. Nathans will complete the lecture series by clarifying what is known about the brain’s ability to process and integrate various elements of the visual system, such as color, motion, and depth.
A guide written for teachers to accompany the 1997 Holiday Lectures on Science.
The eye of a chimpanzee views the world in living color.
The arrangement of cells in the retina reveals how it detects, processes, and relays visual information to the brain.
A unique group of cells in the eye’s retina specifically detects the upward motion of objects, such as a ball thrown in the air or…fireworks.
A close-up view of the sound-producing structure on the wing of a field cricket (Gryllus pennsylvanicus).
Tracking the flight paths and speeds of fruit flies in a wind tunnel may help design better flying robots.
Genetically engineered mice lacking proprioceptive sensory axons are not capable of well-coordinated walking.
The average person has no difficulty raising a coffee mug.
A knee-jerk reflex depends on a simple circuit of proprioceptive sensory neurons and spinal motor neurons.
Proprioceptive feedback makes it easy to touch one's thumb to one's fingers without looking.
Even without visual feedback, we are able to negotiate an obstacle using spatial memory.
The growth cones of two neurons sense and interact with one another.
In the absence of proprioception and visual feedback, it is impossible to touch thumb to fingers accurately.
A person with a disease that kills proprioceptive neurons has severe problems with the simplest of movements.
Some cone snail toxins chemically hyperactivate neurons and immobilize prey, much like a Taser.
Prialt does not block the mammalian motor synapse, but blocks the pain pathway in the spinal cord.
A dramatic illustration of how hearing happens in the ear.