Neurological

Contributing Causes of Dysphagia

Neurological Causes for Dysphagia

  • Stroke: Disruption of blood flow can affect swallowing.

  • Head Trauma: Injury to the brain affecting neural pathways involved in swallowing.

  • Multiple Sclerosis (MS): Affects communication between the brain and body due to nerve damage.

  • Cerebral Palsy: Motor control issues impact the muscles used for swallowing.

  • Dementia: Cognitive decline can lead to swallowing difficulties.

  • Tumor of the Brain or Spinal Cord: Pressure on nerves and swallowing centers.

  • Cervical Spine Injury: Damage to the spinal cord impacting muscle control.

  • Motor Neuron Disease: Affects the neurons responsible for muscle movement.

  • Myopathy: Muscle diseases can compromise the motor function for swallowing.

What is a Neurological Disorder?

  • Neurological disorders affect the functioning of the nervous system which includes the brain, spinal cord, and nerves.

List of Neurological Causes of Dysphagia

  • Dementia

  • Multiple Sclerosis (MS)

  • Parkinson's Disease (PD)

  • Amyotrophic Lateral Sclerosis (ALS)

  • Spinocerebellar Ataxia (SCA)

Dementia

Definition

  • A group of symptoms that affect memory, thinking, and social abilities.

Effect on Swallowing

  • Changes in the brain lead to alterations in muscles, nerves, and reflexes involved in swallowing.

  • This can gradually affect an individual’s ability to eat independently and swallow safely.

Multiple Sclerosis (MS)

Overview

  • Caused by the breakdown of myelin (protective covering of nerve fibers) which disrupts communication between the brain and body.

Effects on Swallowing

  • Damage to the nerves controlling swallowing muscles can cause:

    • Weakness and incoordination.

    • Difficulty managing solids or liquids.

    • Frequent throat clearing during eating or drinking.

    • Sensation of food being stuck in the throat, leading to coughing or choking.

Parkinson's Disease (PD)

Overview

  • A neurological disorder characterized by involuntary movements including shaking and stiffness.

Symptoms

  • Tremors in hands, arms, legs, jaw, or head.

  • Muscle stiffness with prolonged contraction.

  • Slow movement, impaired balance, and coordination.

  • Difficulty with swallowing, chewing, and speaking.

Causes

  • Symptoms arise when nerve cells in the basal ganglia become damaged or die, affecting dopamine production.

Effects on Swallowing

  • Occurs in about 50% of individuals.

  • Symptoms include coughing, choking, throat clearing during meals, and feeling of food getting stuck.

  • Reduced swallowing frequency can lead to drooling due to saliva buildup.

Amyotrophic Lateral Sclerosis (ALS)

Overview

  • A progressive disease affecting nerve cells in the brain and spinal cord, leading to muscle weakness and atrophy.

Effects on Swallowing

  • Approximately 85% experience dysphagia at some stage.

  • Oral Phase: Difficulty moving or controlling food due to a "heavy tongue" sensation.

  • Pharyngeal Phase: Sensation of sticky food in the throat and frequent coughing.

  • Esophageal Phase: Regurgitation of food or liquids.

Spinocerebellar Ataxia (SCA)

Overview

  • A rare inherited disorder causing progressive loss of coordination and muscle control.

Effects on Swallowing

  • Impaired coordination of swallowing muscles due to cerebellar degeneration.

  • Oral Phase: Difficulty forming and moving a food bolus.

  • Pharyngeal Phase: Delayed airway closure increases aspiration risk.

  • Esophageal Phase: Slow motility can lead to food challenges and reflux.

References

  • Various links to scholarly articles and resources on dysphagia and neurological disorders.

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