Cognitive Impairment in Idiopathic Normal Pressure Hydrocephalus

Area of Science:

• Neurology
• Neuroscience
• Geriatrics

Background:

• Idiopathic normal pressure hydrocephalus (iNPH) is a major cause of cognitive impairment in the elderly.
• Current treatments for iNPH offer partial symptom relief via cerebrospinal fluid (CSF) diversion.
• Early iNPH cognitive deficits impact executive functions and working memory, linked to frontostriatal circuits.

Purpose of the Study:

• To review recent advances in understanding the neurobiological mechanisms underlying cognitive impairment in iNPH.
• To highlight key factors contributing to iNPH-related cognitive decline.

Main Methods:

• Review of current literature on iNPH neurobiology.
• Focus on CSF dynamics, brain circuit dysfunction, neuromodulation, and protein pathologies.

Main Results:

• Abnormal CSF dynamics are implicated in iNPH pathogenesis.
• Dysfunction in frontostriatal, entorhinal-hippocampal circuits, and the default mode network contributes to cognitive deficits.
• Aberrant neuromodulation and the presence of amyloid-β and tau pathologies are observed in iNPH.

Conclusions:

• Cognitive decline in iNPH is multifactorial, involving disrupted CSF flow, impaired brain networks, and protein pathologies.
• Further research into these mechanisms may lead to improved therapeutic strategies for iNPH.