A Trial Investigating the Effect of Acute Hypoglycaemia on Cognitive Function and Brain Activation Patterns in Subjects With Type 1 Diabetes

Inclusion Criteria: * Right-handed subjects * Type 1 diabetes mellitus for at least 12 months * Treated with multiple daily insulin injections or continuous subcutaneous insulin infusion (CSII) for at least 12 months * Body mass index 18.0-28.0 kg/m\^2 (both inclusive) Exclusion Criteria: * Subject who has donated any blood or plasma in the past month or more than 500 mL within 3 months prior to screening * Current tobacco user (any smoking or use of nicotinic products within 3 months prior to screening) * Visual impairment or auditory impairment