Reduced higher dimensional temporal dynamism in neurofibromatosis type 1

Area of Science:

• Neuroscience
• Genetics
• Psychiatry

Background:

• Neurofibromatosis type 1 (NF1) is a common genetic disorder with multi-organ effects.
• NF1 is linked to cognitive impairments like learning disabilities and attention deficits.
• While structural brain anomalies in NF1 are known, functional connectivity patterns remain understudied.

Purpose of the Study:

• To investigate static and dynamic functional network connectivity (FNC) in individuals with NF1.
• To compare FNC patterns in NF1 patients with age- and sex-matched healthy controls.
• To explore novel meta-state analysis for higher-dimensional temporal dynamism of brain connectivity.

Main Methods:

• Recruited 30 NF1 participants and 30 healthy controls.
• Conducted comprehensive static and dynamic functional network connectivity (FNC) analysis.
• Utilized meta-state analysis to examine temporal dynamism of whole-brain connectivity.

Main Results:

• NF1 participants showed altered static FNC in cognitive control networks, with decreased anterior-cerebellar connectivity and increased within-network connectivity.
• These alterations were independent of IQ.
• Dynamic FNC analysis revealed NF1 patients spent more time in hypoconnected states and exhibited reduced temporal dynamism of FNC.

Conclusions:

• NF1 is associated with significant alterations in both static and dynamic functional network connectivity.
• Reduced temporal dynamism and increased hypoconnected states in NF1 may indicate broader brain dysfunction.
• Findings suggest potential shared neural mechanisms underlying brain dysfunction in NF1 and other disorders like schizophrenia.