Cockroach Startle Flashcards Preview

Mechanisms of Behaviour > Cockroach Startle > Flashcards

Flashcards in Cockroach Startle Deck (11)
Loading flashcards...
1

Nervous system

brain- thoracic ganglion- connective nerves- abdominal ganglion- segmental nerves

2

brain not necessarily

involved in startle behaviour

3

Can start running from

air produced from movement of tongue before it leaves mouth

4

sense organs

cercus- 20 segments
bears various sensilla including filliform
filiform- 14 per segment (small hairs) sensitive to sudden air movements
each filiform most sensitive to air from a particular direction

5

From air to running

Cercal filiform sensila send axons to last abdominal ganglia
synapse with particulat GIs
GIs axons carry signal to thoracic ganglia

6

G1

attack from same side as axon

7

G2

rear

8

G3

front

9

Why do different GIs respond to threats from different directions?

because they synapse with different filiform sensila

10

extra spikes increase

the angle of turn of escape

11

How many degrees turn does 1 spike cause?

7.4 degrees