01:08
Connections: Role of the Thalamas, The
Except for olfaction, input signals traveling along sensory pathways are routed through relay areas in the thalamus. Beyond serving as a way station, the role of the thalamus is a source of debate. Parts of the thalamus are thought to be involved in...
03:09
The Great Mystery: Circadian Rhythms
Human alertness ebbs and flows along with other brain and body processes, a direct reflection of circadian rhythms. The hormone melatonin also contributes to the control of sleep. It is secreted in the darkness and inhibited by light. People need at...