Comprehension quiz

Sleep Spindles and Memory Consolidation

Listen to the lesson carefully, then answer 10 comprehension questions. Pick one option per question.

Question 1What is the main idea of the lecture on sleep spindles?

Spindles are electrical noise with no real function Spindles reshape our understanding of memory consolidation Spindles only occur during deep dream sleep Spindles can be increased by any stimulation

Question 2What did large scale replication attempts of electrical stimulation show?

Decidedly mixed results Consistent success across studies Serious side effects in participants No measurable brain response

Question 3What determined whether memory consolidation actually succeeded, according to the research?

The total number of spindles The length of stage two sleep The precise timing of spindles The difficulty of the word pairs

Question 4During which stage of sleep do spindles appear?

Deep slow wave sleep Rapid eye movement sleep The very lightest stage of sleep Stage two sleep

Question 5How long does each individual spindle typically last?

Roughly half a second Around two full seconds Several minutes at a time Nearly a quarter of an hour

Question 6How were sleep spindles regarded by researchers for decades?

As markers of serious sleep disorders As mere electrical noise with no function As proof of dreaming in volunteers As signals from damaged brain tissue

Question 7What did researchers correlate spindle density with in their studies?

The total length of nightly sleep The number of dreams reported Overnight improvements on newly learned tasks Daytime alertness after waking up

Question 8According to the prevailing account, what do spindles coordinate?

The release of hormones during deep sleep The repair of damaged brain cells The transition between different sleep stages The transfer of hippocampal memories to the neocortex

Question 9What forms a precisely timed dialogue between brain regions?

Alternating periods of dreaming and waking Repeated bursts of random neural firing Spindles overlapping with slow oscillations and ripples Synchronised breathing and heart rhythms

Question 10What did participants taught word pairs before sleep show?

They recalled more after nights rich in spindles They forgot everything after short nights They recalled less after nights with spindles They improved only with electrical stimulation