HSCI 100 Lecture Notes - Spasm, Aqueous Humour, Golgi Tendon Organ
Document Summary
Peripheral nerves sensory & motor, spinal nerves sensory & motor. Somatic nervous system: nerves that carry info to and from cns = sensations + voluntary movement, carry somatic nerves result in conscious sensations, light sound touch, tells us about world around and within us. Autonomic nervous system: governs involuntary, subconscious activates that keep body function (hr, breathing rate) Parasympathetic nervous system governs bodily activities during restful conditions. Spinal cord, brain (cranial nerves) protected by bony cases (skull and vertebral column), membranes (meninges), fluid cushion (cerebrospinal fluid: meninges 3 connective tissues covering brain and spinal cord. Outer = dura mater, middle = arachnoid, inner = pia mater: cerebrospinal fluid fills space btwn meninges and internal cavities of brai (ventricles) & internal cavities of spinal (central canal) Functions: shock absorption, support, nourishment/waste removal: blood-brain barrier. Selects substances permitted to enter cerebrospinal fluid from blood.