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The skin area (dermatome) and muscle group (myotome) supplied by a single spinal nerve root.
T4 at the nipple, T10 at the umbilicus - handy checkpoints.
Circle of Willis
An anastomotic ring of arteries at the base of the brain that safeguards its blood supply.
The 12 Cranial Nerves
Twelve paired nerves that arise directly from the brain and brainstem.
The Cerebellum
The hindbrain structure that coordinates movement, posture and balance.
Peripheral Nerve Injuries
The motor and sensory loss patterns of the major upper-limb nerves.
The Cavernous Sinus
A paired dural venous sinus beside the body of the sphenoid, remarkable for the nerves and the artery that run through and beside it.
The Ventricular System of the Brain
A set of connected fluid-filled cavities inside the brain that make and hold cerebrospinal fluid, comprising two lateral ventricles, a third and a fourth ventricle.