Why might eyes and facial muscles twitch during REM sleep?

A) The brain relinquishes control over muscle movements, allowing minor spasms to occur.
B) The brain is tuning the neural circuits needed for these movements.
C) After remaining still throughout NREM sleep, the muscles need to contract.
D) There is no need to regulate muscle movements involved in social cues during sleep.

REM Sleep

A phase of sleep characterized by rapid eye movement, low muscular tone, and the propensity for dreaming, playing a crucial role in learning and memory consolidation.

Neural Circuits

Networks of neurons interconnected by synapses to carry out specific functions when activated.

Social Cues

Non-verbal indicators, often subtle, from others that can influence behavior, communication, and understanding in social interactions.