777 research outputs found
Hycleus plagiatus Bologna & Amore & Pitzalis 2018, comb. n.
No full textHycleus plagiatus (Pallas, 1782) comb. n. (Fig. 4T) Meloe plagiatus Pallas, 1782 Types. Types of this species are lost. Distribution. Namibia (new species record for this country) and western South Africa. Material examined and literature records. [Erongo] Karibib: D1935, 30 km NNW Usakos, 21.7833°S 15.5000°E (CB). [Khomas] Windhoek Rural: Windhoek, 22.3400°S 17.0500°E (CB, RMCA). [Hardap] Mariental Urban: C19, 11 km W Mariental, 24.6167°S 17.8500°E (CB). Rehoboth Rural: D1206, 10 km NE Bullsport, 24.10313°S 16.4456°E (CB). Remarks. This species is related to H. haemactus and it was sometimes confused with H. tricolor because of its very similar elytral pattern, which has the middle black fascia dark reddish on the sutural sides. Distinctive characters vs. H. tricolor are: (a) five basal antennomeres black (sometimes V dark yellow); (b) male labial palpi not so widened and without large depression; (c) male maxillary stipe slender; (d) lateral setae of genae silver and very long; (e) male protibiae and protarsomeres with very long black setae; (f) aedeagus shape.Published as part of Bologna, Marco A., Amore, Valentina & Pitzalis, Monica, 2018, Meloidae of Namibia (Coleoptera): taxonomy and faunistics with biogeographic and ecological notes, pp. 1-141 in Zootaxa 4373 (1) on page 73, DOI: 10.11646/zootaxa.4373.1.1, http://zenodo.org/record/115172
Optic flow selectivity in the macaque parieto-occipital sulcus
No full textIn humans, several neuroimaging studies have demonstrated that passive viewing of optic flow stimuli activates higher-level motion areas, like V6 and the cingulate sulcus visual area (CSv). In macaque, there are few studies on the sensitivity of V6 and CSv to egomotion compatible optic flow. The only fMRI study on this issue revealed selectivity to egomotion compatible optic flow in macaque CSv but not in V6 (Cotterau et al. Cereb Cortex 27(1):330–343, 2017, but see Fan et al. J Neurosci. 35:16303–16314, 2015). Yet, it is unknown whether monkey visual motion areas MT + and V6 display any distinctive fMRI functional profile relative to the optic flow stimulation, as it is the case for the homologous human areas (Pitzalis et al., Cereb Cortex 20(2):411–424, 2010). Here, we described the sensitivity of the monkey brain to two motion stimuli (radial rings and flow fields) originally used in humans to functionally map the motion middle temporal area MT + (Tootell et al. J Neurosci 15: 3215-3230, 1995a; Nature 375:139–141, 1995b) and the motion medial parietal area V6 (Pitzalis et al. 2010), respectively. In both animals, we found regions responding only to optic flow or radial rings stimulation, and regions responding to both stimuli. A region in the parieto-occipital sulcus (likely including V6) was one of the most highly selective area for coherently moving fields of dots, further demonstrating the power of this type of stimulation to activate V6 in both humans and monkeys. We did not find any evidence that putative macaque CSv responds to Flow Fields
Spatio-temporal brain mapping of motion-onset VEPs combined with fMRI and retinotopic maps
No full textNeuroimaging studies have identified several motion-sensitive visual areas in the human brain, but the time course of their activation cannot be measured with these techniques. In the present study, we combined electrophysiological and neuroimaging methods (including retinotopic brain mapping) to determine the spatio-temporal profile of motion-onset visual evoked potentials for slow and fast motion stimuli and to localize its neural generators. We found that cortical activity initiates in the primary visual area (V1) for slow stimuli, peaking 100 ms after the onset of motion. Subsequently, activity in the mid-temporal motion-sensitive areas, MT+, peaked at 120 ms, followed by peaks in activity in the more dorsal area, V3A, at 160 ms and the lateral occipital complex at 180 ms. Approximately 250 ms after stimulus onset, activity fast motion stimuli was predominant in area V6 along the parieto-occipital sulcus. Finally, at 350 ms (100 ms after the motion offset) brain activity was visible again in area V1. For fast motion stimuli, the spatio-temporal brain pattern was similar, except that the first activity was detected at 70 ms in area MT+. Comparing functional magnetic resonance data for slow vs. fast motion, we found signs of slow-fast motion stimulus topography along the posterior brain in at least three cortical regions (MT+, V3A and LOR). © 2012 Pitzalis et al
Il Matrimonio etrusco
No full textVoce del ThesCRA sul matrimonio etrusco con la presentazione degli atti propedeutici al matrimonio, degli elementi della cerimonia, dei doni e degli abiti nuzial,
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