Bilaminar and trilaminar disc formation — Flashcards

Flashcard 1: Which form of spina bifida is associated with herniation of meninges and neural tissue through the bony defect? _____

Answer: Meningomyelocele

Flashcard 2: During which week of gestation is the trilaminar disc formed?_____

Answer: 3

Flashcard 3: What is the embryonic origin of the adrenal cortex?_____

Answer: Mesoderm

Flashcard 4: The embryonic basal plate gives rise to _____ (motor or sensory) derivatives

Answer: motor

Flashcard 5: Neurulation begins in the _____ week of fetal development

Answer: third

Flashcard 6: During which week of gestation does the primitive streak appear?_____

Answer: 3

Flashcard 7: What is the embryonic origin of dura mater? _____

Answer: Mesoderm

Flashcard 8: mastoid air cells

Answer: 1st pouch

Flashcard 9: Endoderm lined structures of the ear (1st pharyngeal pouch)

Answer: 1st pouch

Flashcard 10: Embryological origin of the thymus

Answer: 3rd pharyngeal pouch (ventral wing)

Extra: The 3rd pharyngeal pouch gives rise to the Thymus (ventral wing) and the Inferior Parathyroid glands (dorsal wing). Compare with the 4th pharyngeal pouch, which gives rise to the Superior Parathyroid glands.