Neuroembryology 0.0 / 5 ? BiologyneuroanatomyUniversityAll boards Created by: JessCreated on: 14-05-14 16:02 What are the three tissue layers the body is derived from? Endoderm, Ectoderm and Mesoderm. 1 of 18 What is the Ectoderm? The outermost layer that gives rise to the central and peripheral nervous system and epidermis. 2 of 18 Outline the process of neurulation. Starts by a folding at the lateral edges of the neural plate (neural groove), increases until the lateral edges meet to form the neural tube. 3 of 18 What cells give rise to the neurones and glia of the PNS and CNS? The epithelial cells that line the neural tube. 4 of 18 What does the neural cavity give rise to? The ventricular system which bathes the CNS in cerebrospinal fluid. 5 of 18 What part of the neural tube gives rise to the brain? The rostral neural tube. 6 of 18 What are the names of the originally formed three vesicles? Forebrain, midbrain and hindbrain. 7 of 18 Name the 9 major brain regions. Corpus callosum, cerebral cortex, hypothalamus, midbrain, cerebellum, medulla oblongata, spinal cord, pituitary gland, pons 8 of 18 Which two vesicles divide to form the five vesicle embryo? 1 divides to form 1a and 1b and 3 divides to form 3a and 3b.Wh 9 of 18 What is the function of A alpha fibres? Motor functions - somatic proprioception. 10 of 18 What is the function of A beta fibres? Sensing touch and pressure. 11 of 18 What is the function of A gamma fibres? Motor spindles. 12 of 18 What is the function of A delta fibres? Detecting pain and temperature. 13 of 18 What is the function of B fibres? Preganglionic sympathetic. 14 of 18 What is the function of C (DR) fibres? Pain (second pain) 15 of 18 What is the function of C (symp) fibres? Postganglionic sympathetic. 16 of 18 How does axon diameter vary down the classification? Decreases as you go from A to C. 17 of 18 How does conduction velocity vary down the classification? Decreases as you go from A to C. 18 of 18
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