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Coordinate Mapping of Hyolaryngeal Mechanics in Swallowing

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Functional mapping in PD and PSP for sustained phonation and phoneme tasks.

S Sachin¹, S Senthil Kumaran, S Singh

¹Department of Neurology, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, 110 029, India.

Journal of the Neurological Sciences

|August 5, 2008

Summary

Functional magnetic resonance imaging (fMRI) reveals distinct brain activation patterns in Parkinsonian syndromes. Parkinson's disease (PD) patients show increased activation in certain areas, while progressive supranuclear palsy (PSP) patients exhibit widespread cortical dysfunction.

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fMRI Mapping of Brain Activity Associated with the Vocal Production of Consonant and Dissonant Intervals

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Published on: May 23, 2017

Area of Science:

Neuroimaging
Neurology
Speech Science

Background:

Articulatory speech disorders are common in Parkinsonian syndromes.
Understanding the neural underpinnings is crucial for effective treatment.

Purpose of the Study:

To investigate the central basis of speech disorders in Parkinson's disease (PD) and progressive supranuclear palsy (PSP) using functional magnetic resonance imaging (fMRI).

Main Methods:

fMRI scans were performed on 22 PD patients and 18 PSP patients during sustained phonation and phoneme tasks.
Clinical evaluation of speech dysfunction was conducted.
Data analysis involved SPM2 for individual and group comparisons with healthy controls.

Main Results:

PD patients showed superior temporal gyrus activation during sustained phonation and lingual gyrus recruitment for phoneme tasks, indicating compensatory mechanisms.
PSP patients exhibited occipital cortex activation and strong lingual gyrus activation, with reduced primary area activation and recruitment of remote cortical areas, suggesting widespread dysfunction.
Multiple System Atrophy (MSA) patients were excluded due to excessive motion artifacts.

Conclusions:

In PD, executive fronto-striatal network failure may lead to compensatory activation in other brain regions.
In PSP, findings suggest a more generalized cortical dysfunction impacting speech articulation.