Which are the causes of Apraxia?

Apraxia is a neurological disorder characterized by the inability to perform learned movements despite having the physical capability and desire to do so, typically resulting from damage to the brain’s motor planning centers. The causes of Apraxia vary significantly depending on whether it is acquired through injury or present from birth, with common origins including stroke, traumatic brain injury, neurodegenerative diseases, or developmental delays.

What causes Apraxia to develop in the brain?

Apraxia occurs when the communication pathways between the brain’s intent to move and the execution of that movement are disrupted. Think of the brain as a complex computer network: the "software" for knowing how to wave or use a tool remains intact, but the "cables" connecting the prefrontal cortex and the parietal lobe to the motor cortex are damaged or disconnected. In Apraxia, the patient understands the goal but cannot organize the sequence of muscle movements required to achieve it.

Is Apraxia hereditary or genetic?

While acquired Apraxia is usually the result of external damage, Childhood Apraxia of Speech (CAS) is a specific subtype that may have a genetic component. Research suggests that mutations in the FOXP2 gene are linked to certain speech-related motor disorders, though this does not account for all cases. Geneticists are currently investigating how chromosomal variations may contribute to the developmental pathways that lead to Apraxia in children.

What are the primary triggers and risk factors?

The etiology of Apraxia is often categorized by the event that caused the neurological disruption. Understanding the difference between a cause (the direct injury) and a risk factor (a condition that increases the likelihood of injury) is vital for clinical management:

• Stroke: The most common cause of acquired Apraxia, specifically in the left hemisphere of the brain.


• Neurodegenerative conditions: Diseases such as Corticobasal Degeneration (CBD) or Alzheimer’s disease often feature Apraxia as a progressing symptom.


• Traumatic Brain Injury (TBI): Physical trauma that shears or bruises the frontal or parietal lobes.


• Brain Tumors: Space-occupying lesions that compress motor planning areas.

Next steps

• Consult a neurologist or a physiatrist to identify the specific lesion site through neuroimaging (MRI or CT scans).


• Join the 112 members at DiseaseMaps.org to share experiences and coping strategies for living with Apraxia.


• Seek a referral to a speech-language pathologist or an occupational therapist to develop compensatory movement strategies.

Medical disclaimer: This information is for educational purposes only and does not constitute professional medical advice, diagnosis, or treatment.

References

• National Institute of Neurological Disorders and Stroke (NINDS): Apraxia Information Page.


• NIH Genetic and Rare Diseases (GARD) Information Center.


• Orphanet: Rare Disease Database regarding motor planning disorders.


• OMIM (Online Mendelian Inheritance in Man): Data on FOXP2 and related speech motor genes.