Podcast
Questions and Answers
What features characterize the brain at birth compared to its embryonic period?
What features characterize the brain at birth compared to its embryonic period?
- Increased size with no visible structures
- Ridges and clefts known as gyri and sulci (correct)
- Presence of only grey matter
- Presence of smooth surface
During which period do the gyri and sulci of the brain primarily develop?
During which period do the gyri and sulci of the brain primarily develop?
- Postnatal growth
- Second trimester of pregnancy
- First trimester of pregnancy
- Last trimester of pregnancy (correct)
What percentage of adult brain weight does a newborn's brain account for?
What percentage of adult brain weight does a newborn's brain account for?
- 25%
- 20%
- 40%
- 30% (correct)
What is the primary method used to visualize gyri and sulci in normally developing fetuses?
What is the primary method used to visualize gyri and sulci in normally developing fetuses?
What are the two main components of brain tissue identified in imaging studies?
What are the two main components of brain tissue identified in imaging studies?
Flashcards
Gyri and Sulci
Gyri and Sulci
The folds and grooves on the surface of the brain.
Gray Matter
Gray Matter
The outer layer of the brain that contains cell bodies and is responsible for processing information.
White Matter
White Matter
The inner layer of the brain that contains bundles of myelinated axons that connect different parts of the brain.
Magnetic Resonance Imaging (MRI)
Magnetic Resonance Imaging (MRI)
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Ultrasound
Ultrasound
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Study Notes
Brain Development During Fetal Period
- Brain surface is smooth in the embryonic period.
- At birth, the brain has folds (gyri and sulci).
- Gyri and sulci development occurs during the last trimester of pregnancy.
- MRI and high-resolution ultrasound can visualize gyri and sulci in developing fetuses.
- MRI allows detailed visualization of grey matter (cell bodies) and white matter (myelinated axons).
- A newborn's brain is 30% the size of an adult brain.
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Description
Test your knowledge on brain development during the fetal period. This quiz explores key changes such as the transition from a smooth brain surface to the formation of gyri and sulci. Understand the importance of MRI and ultrasound in visualizing these developments.
