Correlative Neuroanatomy Flashcards
(201 cards)
the brain weights
1.4 kg
2 substances important for energy metabolism in the brain
glucose and oxygen
the embryo is composed of 3 germ layers
ectoderm, mesoderm, endoderm
neural tissue appear at __ week of development
3rd week
neural folds fuse to form
neural tube
neural folds fusion begins in this region
cervical region
three primary transverse segments of the brain
procencephalon (forebrain)
mesencephalon (midbrain)
rhombencephalon (hindbrain)
five secondary segments of the brain
telencephalon diencephalon mesencephalon metencephalon myelencephalon
gives rise to the cerebral hemispheres
telencephalon
gives rise to thalamus and hypothalamus
diencephalon
gives rise to pons and cerebellum
metencephalon
gives rise to medulla
myelencephalon
myelination almost completed at
2 years
Myelin migration completed at
5 months
beginning of myelination
4 weeks
neural plate develops at
16 days
Neural groove and tube develops at
18 days
Neural tube defects are failure of
Dorsal induction
Enumerate conditions associated with Failure of dorsal induction
Craniorachischisis totalis Anencephaly Myeloschisis Encephalocoele Myelomeningocoele Arnold-Chiari malformation
Failure of the neural tube to close spontaneously leads to
Neural tube disorders
Neural tube closure occurs between
3rd and 4th week of gestation
Midline defect of vertebral bodies
Spina bifida occulta
Spina bifida occulta typically involves
L5- S1
Manifestations of spina bifida occulta
Most are asymptomatic Overlying skin manifestations: Hair patch Lipoma Skin discoloration Dermal sinus