The nervous system is divided into the central nervous system (CNS) and peripheral nervous system (PNS). The CNS contains the brain and spinal cord, which coordinate incoming and outgoing information. The PNS connects the CNS to organs and sensory receptors, carrying signals to and from the CNS. Neurons are the basic functional units and come in sensory, motor, and interneuron types that differ in their dendrite and axon structures. Sensory neurons carry signals to the CNS while motor neurons carry signals away, and interneurons connect signals within the CNS.

1. NERVOUS SYSTEM Divisisons of Nervous System

6. REFLEX ARC

13. Spinal VS Epidural

15. Cranial nerves

16. Spinal Nerves

17. Table 04 Symptom(s) of Spinal Cord Injury Note: Other effects of SCI may include low blood pressure, inability to regulate blood pressure effectively, reduced control of body temperature, inability to sweat below the level of injury, and chronic pain. Decreasing control of hip flexors and legs, dysfunction of bowel, bladder, and sex Leg muscles, bowel, bladder, sexual organs Lumbar and Sacral Paraplegia Abdominal muscles T9-T12 Paraplegia, poor trunk control Chest muscles T2-T8 dexterity problems with hand and fingers Triceps, hand C7-T1 No hand function Wrist extenders C6 No control at wrist or hand Deltoids, biceps C5 Breathing problem Diaphragm C2-C4 Quadriplegia Head and Neck C1 Symptom(s) of SCI Innervated Body Part(s) Spinal Nerve(s)