A Taser hyperexcites the nervous system to cause a rigid immobilization of its target.
Cone snails have evolved many different toxins for different uses. Total molecular biodiversity may number in the millions.
Understanding the neural circuits in the spinal cord that control movement.
Finding factors to reverse age-related loss of cell maintenance, and some examples of stem cell therapies.
A live recording of muscle activity from Dr. Jessell's biceps and triceps muscles.
Proprioceptive feedback makes it easy to touch one's thumb to one's fingers without looking.
Dr. Ronald Evans discusses the so-called "marathon" mouse, with a mutation in the PPAR-gamma gene, and its performance on a treadmill relative to a normal mouse.
Electrical activity recorded from the leg muscles reveals different patterns of activation during different gaits.
Dr. Huda Zoghbi interviews Milan Cloud, a patient who has inherited the neurological disorder spinocerebellar ataxia 1, or SCA1.
In a giraffe's walk, left and right limbs move alternately, while in a kangaroo's hop, opposing limbs move together.
A person with a disease that kills proprioceptive neurons has severe problems with the simplest of movements.
The growth cone of a neuron avoids repellant molecules and navigates to innervate the appropriate muscle.