In the context of 'Learning Disabilities', which specific part of the brain or neural pathway primarily exhibits functional disruption under a 'Neuropsychological Battery'—one of the most specific and authentic clinical tests for identifying learners with 'Dyscalculia'?

Learning Disabilities constitute a crucial topic in Child Development and Pedagogy. Dyscalculia is a specific learning disorder that causes difficulty in learning mathematical calculations, understanding digits, and grasping numerical concepts.

Key Scientific Findings:

• Neuropsychological and neuroimaging studies have proven that children with dyscalculia exhibit structural and functional abnormalities or deficits in the parietal lobe of the brain, specifically the Intraparietal Sulcus (IPS).
• This region is centrally responsible for representing numerical magnitude and spatial-numerical mapping in the brain.

Therefore, option (b) provides the most accurate scientific explanation.