Lecture—08 December 2003

Multiple innervation

Annelids

Segmentation and the paired segmentally arranged ganglia

Subepidermal nerve net—a few cells are light sensitive

Superesophageal ganglion

Subesophageal ganglion

Giant nerve fibers

Molluscs—

Some sort of segmentation, by having paired and fused ganglia

Cephalic

Visceral

Pedal

Central versus peripheral or distributed processing

Cuttlefish—change in body coloration

Chromatophores—expansion contraction is controlled by the nervous system