CNTN1 and chronic inflammatory demyelinating polyradiculoneuropathy: Patients with anti-CNTN1 antibodies display severely abnormal nerve conduction, with slowed conduction velocities and prolonged distal latencies, consistent with signs of demyelination and often more pronounced than in CIDP, as well as early axonal involvement with varying reports of conduction block, similar to NF155-AN [55,62,83,89].