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Ac = attachment cell bl = basement lamina co = collar cp = cap db = distal body ds =dendritic sheath gl = glia id = inner dend. seg. mt = microtubules.

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Presentation on theme: "Ac = attachment cell bl = basement lamina co = collar cp = cap db = distal body ds =dendritic sheath gl = glia id = inner dend. seg. mt = microtubules."— Presentation transcript:

1 ac = attachment cell bl = basement lamina co = collar cp = cap db = distal body ds =dendritic sheath gl = glia id = inner dend. seg. mt = microtubules od =outer dend. sheath tb = tubular body th = thecogen cell sc = sensory cell

2 Keil 1997 Microsc. Res. Technique 39: 506-539 a b c d Insect cuticular mechanoreceptors ac = attachment cell th = thecogen cell sc = sensory cell

3 Insect mechanoreceptor Keil 1997 Microsc. Res. Technique 39: 506-539 b c ac = attachment cell bl = basement lamina co = collar cp = cap db = distal body ds =dendritic sheath gl = glia id = inner dend. seg. mt = microtubules od =outer dend. sheath tb = tubular body th = thecogen cell sc = sensory cell

4 Keil 1997 Microsc. Res. Technique 39: 506-539

5 ac = attachment cell bl = basement lamina co = collar cp = cap db = distal body ds =dendritic sheath gl = glia id = inner dend. seg. isl = inner sensillum lymph mt = microtubules od =outer dend. Sheath pb = proximal basal body tb = tubular body th = thecogen cell tr = trichogen cell sc = sensory cell

6 Cricket filiform receptor c. Transitory region Keil 1997 Microsc. Res. Technique 39: 506-539 ac = attachment cell bl = basement lamina co = collar cp = cap db = distal body ds =dendritic sheath gl = glia id = inner dend. seg. isl = inner sensillum lymph mt = microtubules od =outer dend. Sheath pb = proximal basal body tb = tubular body th = thecogen cell tr = trichogen cell sc = sensory cell

7 Fly “macrochaeta” receptor Keil 1997 Microsc. Res. Technique 39: 506-539 ac = attachment cell bl = basement lamina co = collar cp = cap db = distal body ds =dendritic sheath gl = glia id = inner dend. seg. isl = inner sensillum lymph mt = microtubules od =outer dend. Sheath pb = proximal basal body tb = tubular body th = thecogen cell tr = trichogen cell sc = sensory cell

8 Cockroach cercal filiform receptor

9 Tubular body ac = attachment cell bl = basement lamina co = collar cp = cap db = distal body ds =dendritic sheath gl = glia id = inner dend. seg. isl = inner sensillum lymph mt = microtubules od =outer dend. Sheath pb = proximal basal body rg = ridge of dend. sheath tb = tubular body th = thecogen cell tr = trichogen cell sc = sensory cell se = stimulating edge

10 Cricket filiform sensilla

11 Fly campaniform sensilla

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13 Scolopidial receptor ac = attachment cell bl = basement lamina co = collar cp = cap db = distal body ds =dendritic sheath gl = glia id = inner dend. seg. isl = inner sensillum lymph mt = microtubules od =outer dend. Sheath pb = proximal basal body rg = ridge of dend. sheath tb = tubular body th = thecogen cell tr = trichogen cell sc = sensory cell se = stimulating edge

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15 Mulder-Rosi, J., G.I. Cummins and J.P. Miller “The cricket cercal system implements delay- line processing. J. Neurophysiol. (on line Jan 27, 2010)

16 Experimental set-up for air-jet stimulation Mulder-Rosi et al 2010 J. Neurophysiol (online Jan 27, 2010)

17 Single afferent, averaged response “ensemble afferent responses” from 1 stimulation point triggering average on 1 sensillum on DORSAL SURFACE (sensitive to transverse wind current)

18 Spatial independence of conduction speed Slope = 1.87 ± 0.09 m/s 23 units

19 Stimulus-sequence-dependence of proximal compound AP

20 Interneuron responses to stimulus sequences 50 stimuli

21 3 interneuron response profiles Sequence- independent IN Tip and base close in time preference (but bulk flow excluded) Tip-before base preference

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