Understanding Brain Decussation

Understanding Brain Decussation

Assessment

Interactive Video

Biology, Science

7th - 12th Grade

Hard

Created by

Amelia Wright

FREE Resource

The video explores the concept of brain decussation, where the brain's left side controls the right side of the body and vice versa. This phenomenon is common among vertebrates and has been studied for its evolutionary origins. Historical theories and modern ideas are discussed, including hypotheses about early vertebrates having backward or sideways brains. The video also examines human developmental asymmetry and its effects. The episode concludes with acknowledgments to supporters.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the term used to describe the phenomenon where each side of the body is controlled by the opposite side of the brain?

Cross-linking

Inversion

Reversal

Decussation

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which historical theory suggested that brain swapping was necessary for visual alignment?

Defensive mechanism theory

Visual field alignment theory

Backward brain hypothesis

Nerve efficiency theory

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is one modern theory about why decussation might have evolved?

To pack nerves efficiently

To increase brain size

To enhance memory

To improve balance

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does the backward brain hypothesis suggest about early vertebrate ancestors?

Their brains were larger

Their brains were on backward

They had no brain

They had multiple brains

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which type of animal was observed to support the sideways brain hypothesis?

Frogs

Zebrafish

Lizards

Birds

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What developmental feature in humans is suggested to be a result of the sideways brain hypothesis?

Larger brains

Rotated faces

Smaller eyes

Symmetrical faces

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

According to the video, what is a common behavior that might reflect human asymmetry?

Walking in a straight line

Tilting head to the left when kissing

Tilting head to the right when kissing

Hugging with both arms

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