The tail flip of the Norway lobster, Nephrops norvegicus

摘要: 1. In the Norway lobster, Nephrops norvegicus dynamic righting reactions are produced by tail flips which executed from tilted body positions. A study of their properties has been made in tethered animals using a two dimensional strain gauge system (Fig. 1). 2. Righting forces both initial, giant fibre mediated flip is elicited abrupt mechanical or electrical stimulation 2), and subsequent swimming 4). The lateral proportional to degree tilt (Figs. 3, 4). 3. By inactivating thoraco-abdominal joint uropods various combinations it established that rotation abdomen movements make major contributions 5, 6). 4. Cinematographic myographic analyses uropod identify flexion exopodite blade, action productor flexor muscles, as asymmetric movement induces torque 7, 8). However, remain fully opened throughout flexion. 5. Removal statocysts abolishes 9). 6. These results discussed terms prebiassing motor circuitry statocyst signal, relation other possible sources sensory modulation this ‘stereotyped’ behaviour.