ac = attachment cellbl = basement laminaco = collarcp = capdb = distal bodyds =dendritic sheathgl = gliaid = inner dend. seg.mt = microtubulesod =outer dend. sheathtb = tubular bodyth = thecogen cellsc = sensory cell

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

b

c

d

Insect cuticular mechanoreceptors

ac = attachment cellth = thecogen cellsc = sensory cell

Insect mechanoreceptor

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

b c

ac = attachment cellbl = basement laminaco = collarcp = capdb = distal bodyds =dendritic sheathgl = gliaid = inner dend. seg.mt = microtubulesod =outer dend. sheathtb = tubular bodyth = thecogen cellsc = sensory cell

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

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

ac = attachment cellbl = basement laminaco = collarcp = capdb = distal bodyds =dendritic sheathgl = gliaid = inner dend. seg.isl = inner sensillum lymphmt = microtubulesod =outer dend. Sheathpb = proximal basal bodytb = tubular bodyth = thecogen celltr = trichogen cellsc = sensory cell

Cricket filiform receptor

c. Transitory region Keil 1997 Microsc. Res. Technique 39: 506-539

ac = attachment cellbl = basement laminaco = collarcp = capdb = distal bodyds =dendritic sheathgl = gliaid = inner dend. seg.isl = inner sensillum lymphmt = microtubulesod =outer dend. Sheathpb = proximal basal bodytb = tubular bodyth = thecogen celltr = trichogen cellsc = sensory cell

Fly “macrochaeta” receptor

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

ac = attachment cellbl = basement laminaco = collarcp = capdb = distal bodyds =dendritic sheathgl = gliaid = inner dend. seg.isl = inner sensillum lymphmt = microtubulesod =outer dend. Sheathpb = proximal basal bodytb = tubular bodyth = thecogen celltr = trichogen cellsc = sensory cell

Cockroach cercal filiform receptor

Tubular body

ac = attachment cellbl = basement laminaco = collarcp = capdb = distal bodyds =dendritic sheathgl = gliaid = inner dend. seg.isl = inner sensillum lymphmt = microtubulesod =outer dend. Sheathpb = proximal basal bodyrg = ridge of dend. sheathtb = tubular bodyth = thecogen celltr = trichogen cellsc = sensory cellse = stimulating edge

Cricket filiform sensilla

Fly campaniform sensilla

Fly campaniform sensilla

Scolopidial receptorac = attachment cellbl = basement laminaco = collarcp = capdb = distal bodyds =dendritic sheathgl = gliaid = inner dend. seg.isl = inner sensillum lymphmt = microtubulesod =outer dend. Sheathpb = proximal basal bodyrg = ridge of dend. sheathtb = tubular bodyth = thecogen celltr = trichogen cellsc = sensory cellse = stimulating edge

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)

Experimental set-up for air-jet stimulation

Mulder-Rosi et al 2010 J. Neurophysiol (online Jan 27, 2010)

Single afferent, averaged response

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

Spatial independence of conduction speed

Slope = 1.87 ± 0.09 m/s

23 units

Stimulus-sequence-dependence of proximal compound AP

Interneuron responses to stimulus sequences

50 stimuli

3 interneuron response profilesSequence-independent IN

Tip and base close in time preference (but bulk flow excluded)

Tip-before base preference