NURS 311: Peripheral Neuropathy

Peripheral Neuropathy

Definition

• Peripheral neuropathy is a common condition that occurs when injury or disease damages the peripheral nervous system.

Overview of the Peripheral Nervous System

• Origin: Peripheral nerves extend from the brain and spinal cord to skin, muscle, and tissues.
• Function: Relays vital information between the body and brain in the form of electrical impulses.

Types of Peripheral Nerves

• Motor Nerves: Regulate the movements of the body's skeletal muscles.
• Sensory Nerves: Transmit sensations such as heat, vibration, touch, and pain to the brain.
• Autonomic Nerves: Regulate the activities of internal organs and glands.

Structure of Nerves

• Each nerve consists of many interconnected cells called neurons.
• Function of Neurons: They transmit impulses at lightning speed, allowing the brain to respond to vital body input.

Causes of Peripheral Neuropathy

• Damage to peripheral nerves can disrupt critical communication, leading to peripheral neuropathy.

Types of Nerve Damage

1. Mononeuropathy
      - Damage to a single nerve.
      - Often results from injury or repetitive stress.
      - Example: Carpal Tunnel Syndrome
        - Caused by repeated impact to the median nerve in the wrist, leading to:
          - Tingling
          - Pain
          - Weakness in the hand, arm, and shoulder.

2. Polyneuropathy
      - Involvement of multiple nerves, far more common than mononeuropathy.
      - Damage typically begins in nerves farthest from the central nervous system and progresses symmetrically.
      - Causes:
        - Diabetes and other systemic diseases.
        - Infections.
        - Exposure to toxic substances.
      - Can affect any or all of the three nerve types.

Symptoms of Peripheral Neuropathy

• Symptoms are specific to each type of nerve damage:
    - Sensory Nerve Damage: Seen in diabetes,
      - Leads to numbness in hands and feet.
      - Diminished ability to detect temperature.
      - Insensitivity to pain or oversensitivity.
    - Motor Nerve Damage:
      - Results in muscle weakness.
      - May include twitching and pain.
    - Autonomic Nerve Damage:
      - Common signs include:
        - Intolerance to heat.
        - Loss of bladder control.
        - Gastrointestinal disturbances.
        - Impairments in breathing.
        - Impairments in heart rate.

Treatment of Peripheral Neuropathy

• Treatment generally aims at addressing the underlying cause while providing symptomatic relief.

Mononeuropathy Treatment

• Pain relief medications.
• Physical therapy to maintain muscle strength.
• Surgery to release compressed or entrapped nerves.

Polyneuropathy Treatment

• Treatment focuses on the underlying disease to prevent further nerve damage.
• Possible recommendations include:
    - Pain medication to relieve symptoms.
    - For polyneuropathy with sensory impairment:
      - Doctors may recommend orthopedic shoes to prevent foot injury.