Segments in this Video

Chronobiology Introduction (02:16)


Professor Till Roenneberg explains how biological clocks signal living processes. The Industrial Revolution disrupted our internal time systems.

Chronobiology Implications (01:17)

Understanding our biological clock can improve our health. Roenneberg explains why most people begin their day too early.

Adolescent Time Zone (01:58)

Most teenagers have difficulty waking up. Roenneberg's sleep experiment shows their biological clock shifts to later in the day—suggesting schools should start later.

Chronobiology DNA (01:11)

Research shows that some adults are genetically programmed to wake up later than others.

Central Biological Clock (00:50)

Learn how brain nerve cells synchronize interior and exterior time by responding to daylight. Genes determine early and late risers.

Intelligent Medication (03:10)

Learn how researchers developed a rheumatoid arthritis treatment using biological rhythms to suppress inflammatory messengers.

Cancer Chronotherapy (05:12)

French researchers administer chemotherapy to patients according to biological rhythms—minimizing damage to healthy cells and decreasing side effects.

Determining Chronotype (03:15)

Achim Kramer uses glow worm enzymes to study when "clock" genes are active in cells. He hopes to develop a simple test to identify early and late risers.

Winter Depression (01:08)

Most people don't get enough sleep. Learn how daylight hours affect our biological clock that is still sensitive to the seasons.

Social Jetlag (02:50)

Roenneberg explains how biological, sun, and social clocks interact. Learn how modern time zones create a discrepancy between internal and external time.

Electronics and Sleep (02:13)

Blue light signals the brain to synchronize to the sun's position. Learn how computer screens disrupt melatonin and contribute to attention deficit disorder among children.

Chronobiology and School Performance (03:44)

Focusing in the early morning is a challenge for most teenagers. A classroom is fitted with blue light to test whether it increases alertness by mimicking daytime.

Young Adult Biological Clock (01:10)

Roenneberg believes that teenagers turn into night owls because they've had to engage in nocturnal activities for most of human history.

Chronobiology and Dementia (04:08)

Researchers adjust nursing home lighting systems in an effort to treat nighttime anxiety and reestablish sleep patterns.

Sleep Deprivation Health Effects (01:02)

Dementia patients benefit from bright daylight and darkness at night. Studies suggest links between Alzheimer's disease and insufficient rest.

Chronobiology and Diabetes (03:52)

Learn how melatonin inhibits insulin release, causing Type II diabetes. Overeating and sleep deprivation cause pancreatic overproduction.

Sleep and Health (01:29)

Despite modern attitudes, sleep is important for body function. Night shift workers have higher risks of illness.

Slowing Daily Life (02:01)

A Benedictine nun discusses how to eliminate modern distractions and focus on what's important.

Chronobiology Society (00:47)

Roenneberg argues that allowing people to live according to their biological clock would reduce healthcare costs and improve productivity.

Chronotherapy Program (01:31)

A French colon cancer patient treated according to his biological clock experiences reduced side effects from chemotherapy.

Chronotherapy Success (04:45)

A colon cancer survivor shares how illness has changed her perspective. Treatment according to the biological clock protects healthy cells while targeting malignancies.

Chronobiology Education Results (01:56)

Students make 30% fewer mistakes on standardized testing under daylight lamps. Roenneberg advocates projecting the sky into classrooms and offices.

Credits: Chronobiology: How Our Body Clock Works (00:30)

Credits: Chronobiology: How Our Body Clock Works

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Chronobiology: How Our Body Clock Works

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For thousands of years, people were able to live in sync with their biological clock. In our modern world however, people rely on alarm clocks. Genetically programmed cell interactions stipulate when we sleep and when we rise, and most of society is up too early. Sleep deprivation is linked to sleep disruptions, depression, diabetes, and even dementia. Chronobiology research and development will help us live healthier lives and respond to medical treatment such as chemotherapy more effectively. (52 minutes)

Length: 53 minutes

Item#: BVL58933

ISBN: 978-1-60057-320-0

Copyright date: ©2013

Closed Captioned

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Only available in USA and Canada.