40 Questions
What forms during the 3rd and 4th weeks of pregnancy?
The neural tube
Which of the following is NOT a derivative of neural crest cells?
Muscle cells of the heart
What is the function of melanocytes?
To produce pigment
Where do Schwann cells originate from?
Neural crest cells
Which neural crest derivative is associated with the thyroid gland?
C cells
What is the function of the conotruncal septum?
To separate the heart into left and right sides
What is the fate of neural crest cells in the pharyngeal arches?
They form the mesenchyme
Which of the following is NOT a component of the nervous system that originates from neural crest cells?
Smooth muscle cells of the gut
Which of the following is a derivative of the forebrain?
Cerebral hemispheres
Which part of the brain is derived from the midbrain?
Tectum
Which of the following is a derivative of the hindbrain?
Pons
Which of the following nerves originates from the hindbrain?
Facial nerve (CN VII)
Which of the following structures is NOT a derivative of the forebrain?
Cerebellum
Which of the following is a derivative of the telencephalon?
Cerebral hemispheres
What is the term for the grooves that separate the convolutions of the cerebral cortex?
Sulci
What is the function of arachnoid villi granulations?
To drain cerebrospinal fluid into the bloodstream
Which of the following nerves originates from the midbrain?
Oculomotor nerve (CN III)
Which of the following is a derivative of the diencephalon?
Thalamus
What is the location of the transverse sinuses?
Occupying the attached margin of the tentorium cerebelli
What is the primary function of commissures in the brain?
To connect the right and left half of the hemispheres
What is the term for the process by which neuroblasts migrate to the subpial position and differentiate into full mature neurons?
Cell migration and differentiation
What is the characteristic of the emissary veins?
They are valveless
What is the region of the pallium that forms the hippocampus and paleopallium?
Archicortex
What is the name of the junction of the straight sinus and the superior sagittal sinus?
Sinus confluence
What do the superior petrosal sinuses drain into?
Transverse sinus
What is the term for the outer layer of the cerebral hemispheres that develops from the pallium?
Cerebral cortex
What is the characteristic of the motor cortex in terms of cell types?
It contains a large number of pyramidal cells
What is the direction of the sigmoid sinus?
It turns downwards and inferiorly
What is the term for the period of rapid growth of the cerebral hemispheres during fetal life?
Final part of fetal life
What is the name of the structure that continuous with the superior bulb of the internal jugular vein?
Sigmoid sinus
What is the potential site of infection?
The dural venous sinus
What is the percentage of the cortical structure that is made up of the neocortex?
90%
Which structure is responsible for CSF reabsorption?
Arachnoid villi
Where does the sigmoid sinus drain into?
Internal jugular vein
What is the function of the superior and inferior ophthalmic veins?
To drain into the cavernous sinus
Where is the junction of the falx cerebri and tentorium cerebelli located?
Lower free margin of falx cerebri
Which sinus is formed by the union of the great cerebral vein and inferior sagittal sinus?
Straight sinus
What is the course of the sigmoid sinus?
S-shaped course in the temporal and occipital bone
What is the relationship between the left and right transverse sinuses?
The left transverse sinus is usually larger
What is the connection between the cavernous sinus and the transverse sinus?
Through the petrosal sinus
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