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Layers of the brain for all you A&P freaks out there.
From right to left: Scalp - Periosteum - Bone - Dura Mater - Arachnoid Mater - Pia Mater - Brain Tissue
The presence and strength of a reflex is an important sign of nervous system development and function.
A. Rooting reflex.
B. Palmar grasp reflex.
C. Moro's reflex (startle reflex).
D. Tonic neck reflex.
E. Babinskis reflex.
F. Stepping reflex.
During depolarization, fast sodium channels open up and sodium ions rush into the cell, creating a positively charged state. This is represented by stage 0 in the image below.