scholarly journals Frequency organization of the Johnston’s organ in male mosquitoes (Diptera, Culicidae)

2017 ◽  
Vol 220 (21) ◽  
pp. 3927-3938 ◽  
Author(s):  
Dmitry N. Lapshin ◽  
Dmitry D. Vorontsov
Keyword(s):  
Johnston's Organ ◽  
Johnston’S Organ ◽  
Male Mosquitoes

The structure and probable function of the internal cuticular parts of Johnston's organ in mosquitoes (Aedes aegypti)

1989 ◽  
Vol 67 (11) ◽  
pp. 2625-2632 ◽  
Author(s):  
Peter Belton
Keyword(s):  
Aedes Aegypti ◽  
Antennal Segment ◽  
Complex Structures ◽  
Probable Function ◽  
Johnston's Organ ◽  
Johnston’S Organ

Although the flagellum of the antennae of mosquito-like insects is known to vibrate in response to sounds, descriptions of the cuticular parts that suspend it in the second antennal segment are somewhat contradictory and incomplete. The complex structures that attach the base of the flagellum to the pedicel and its sense cells in Aedes aegypti (L.) (Diptera: Culicidae) are described. They are consistent with the functions of suspending the flagellum firmly in the pedicel and of anchoring the sheathing rods of the acoustically sensitive scolopidia while their dendrites are stretched or bent by the movement of the prongs.

scholarly journals Parallel Processing of Olfactory and Mechanosensory Information in the Honey Bee Antennal Lobe

2021 ◽  
Vol 12 ◽  
Author(s):  
Ettore Tiraboschi ◽  
Luana Leonardelli ◽  
Gianluca Segata ◽  
Albrecht Haase
Keyword(s):  
Honey Bee ◽  
Antennal Lobe ◽  
Low Frequency ◽  
Dual Function ◽  
Mechanical Stimuli ◽  
Tuning Curves ◽  
Johnston's Organ ◽  
Johnston’S Organ ◽  
Clean Air

In insects, neuronal responses to clean air have so far been reported only episodically in moths. Here we present results obtained by fast two-photon calcium imaging in the honey bee Apis mellifera, indicating a substantial involvement of the antennal lobe, the first olfactory neuropil, in the processing of mechanical stimuli. Clean air pulses generate a complex pattern of glomerular activation that provides a code for stimulus intensity and dynamics with a similar level of stereotypy as observed for the olfactory code. Overlapping the air pulses with odor stimuli reveals a superposition of mechanosensory and odor response codes with high contrast. On the mechanosensitive signal, modulations were observed in the same frequency regime as the oscillatory motion of the antennae, suggesting a possible way to detect odorless airflow directions. The transduction of mechanosensory information via the insect antennae has so far been attributed primarily to Johnston’s organ in the pedicel of the antenna. The possibility that the antennal lobe activation by clean air originates from Johnston’s organ could be ruled out, as the signal is suppressed by covering the surfaces of the otherwise freely moving and bending antennae, which should leave Johnston’s organ unaffected. The tuning curves of individual glomeruli indicate increased sensitivity at low-frequency mechanical oscillations as produced by the abdominal motion in waggle dance communication, suggesting a further potential function of this mechanosensory code. The discovery that the olfactory system can sense both odors and mechanical stimuli has recently been made also in mammals. The results presented here give hope that studies on insects can make a fundamental contribution to the cross-taxa understanding of this dual function, as only a few thousand neurons are involved in their brains, all of which are accessible by in vivo optical imaging.

The Orientation of Ants

1954 ◽  
Vol 31 (3) ◽  
pp. 356-375
Author(s):  
D. M. VOWLES
Keyword(s):  
Johnston's Organ ◽  
Johnston’S Organ ◽  
Set Up

1. The orientation of ants to gravity has been investigated, and it is shown that orientations symmetrically placed on either side of the vertical are confused. 2. The georeceptor is located in the antenna, and is probably Johnston's organ. Only one antenna is in use at any one time during geo-orientation. 3. The light compass reaction has been investigated and it is shown that orientations Θ° and 180-Θ° are confused. No explanation can be offered for this. 4. The results are discussed in relation to the hypothesis that ants have a taxis mechanism common to all senses. It is suggested that the function of this mechanism is to set up a temporary labile symmetry of the ant with respect to orientatory stimuli.

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