The peripheral nervous system (PNS) is a complex network of nerves that connect the central nervous system (CNS) to the rest of the body. It is responsible for carrying information to and from the CNS to the muscles, organs, and skin. Here is a full tutorial on the anatomy of the peripheral nervous system:
**Structure of the Peripheral Nervous System** The peripheral nervous system can be divided into two main parts: the somatic nervous system and the autonomic nervous system. 1. **Somatic Nervous System**: This part of the PNS controls voluntary movements, such as walking, talking, and writing. It also receives sensory information from the skin, muscles, and joints. 2. **Autonomic Nervous System**: This part of the PNS controls involuntary functions, such as heart rate, digestion, and breathing. It is further divided into two parts: the sympathetic nervous system and the parasympathetic nervous system. **Components of the Peripheral Nervous System** The peripheral nervous system is made up of several components, including: 1. **Nerves**: These are bundles of nerve fibers that carry information to and from the CNS. They are divided into three types: - **Sensory Nerves**: These nerves carry information from the senses (touch, taste, smell, sight, and hearing) to the CNS. - **Motor Nerves**: These nerves carry information from the CNS to the muscles, causing them to contract or relax. - **Mixed Nerves**: These nerves contain both sensory and motor fibers. 2. **Ganglia**: These are clusters of nerve cell bodies located outside the CNS. They are connected to the CNS by nerves. 3. **Plexuses**: These are networks of nerves that connect the spinal nerves to the rest of the body. **Peripheral Nervous System Nerves** The peripheral nervous system contains 31 pairs of spinal nerves and 12 pairs of cranial nerves. 1. **Spinal Nerves**: These nerves exit the spinal cord and branch out to the rest of the body. They are divided into four regions: cervical, thoracic, lumbar, and sacral. 2. **Cranial Nerves**: These nerves are attached to the brain and are primarily responsible for the sensory and motor functions of the head and neck.
What is Neuro Stroke? Neuro stroke, also known as a cerebrovascular accident (CVA) or simply a stroke, is a medical condition in which poor blood flow to the brain results in cell death. There are two main types of stroke: ischemic, due to lack of blood flow, and hemorrhagic, due to bleeding. Both cause parts of the brain to stop functioning properly. Signs and symptoms of a stroke may include an inability to move or feel on one side of the body, problems understanding or speaking, dizziness, or loss of vision to one side. Signs and symptoms often begin suddenly, and may progress over hours or days. Types of Neuro Stroke: 1. Ischemic Stroke This occurs when a blood vessel supplying blood to the brain is obstructed. It accounts for about 87% of all strokes. 2. Hemorrhagic Stroke This occurs when a weakened blood vessel ruptures and bleeds into the surrounding brain. The blood accumulates and compresses the surrounding brain tissue. Diagnosis of Neuro Stroke: 1. Physical Exami...
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