118,898 research outputs found
Gravity reception in crickets: the influence of cereal and antennal afferences on the head position
Get PDFHorn E, Bischof H-J. Gravity reception in crickets: the influence of cereal and antennal afferences on the head position. Journal of Comparative Physiology, A: Neuroethology, Sensory, Neural, and Behavioral Physiology. 1983;150(1):93-98.In the cricket,Gryllus bimaculatus, compensatory head movements are elicited by cereal and antennal receptors when the animals are rotated around their longitudinal axis. The cereal afferences originate in the club-shaped sensilla, whereas the antennal ones probably arise in receptors measuring displacements of the flagellum at the joint between scapus and pedicellus. The clubshaped cereal sensilla are true gravity receptors different from the proprioceptive gravity receptor systems characteristic of most insects
Bistum Sitten, Bischof Landrich an Bistum Sitten, Domstift, Kapitel - 0.0.1227
No full textzu 13: Bischof L>andrichº; vgl. LBA Nr.13845@13845|; Archivsignatur: Nr.102{'name': 'DFG', 'uri': 'dfg.png'
The visual field and visually guided behavior in the zebra finch (Taeniopygia guttata)
Get PDFBischof H-J. The visual field and visually guided behavior in the zebra finch (Taeniopygia guttata). Journal of Comparative Physiology, A: Sensory Neural and Behavioral Physiology. 1988;163(3):329-337.Measurements were made of the physical properties of the visual system of the zebra finch, a bird with laterally placed eyes. The use of the visual system in pecking and courtship behavior was examined. It was demonstrated that the optical axis and the fovea of the eye point in a direction about 62.degree. from the sagittal axis of the head. The visual field of each eye covers about 170.degree. in the horizontal plane. In the frontal region there is an overlap of about 30.degree.-40.degree. where the birds can see binocularly; caudally there is a 'gap' in the visual field of 60.degree.. The point of best binocular viewing is in the sagittal plane at 16.5.degree. below the beak. Concerning movement detection, the upper threshold is 540.degree./s for the binocular (frontal) part of the visual field and about 1100.degree./s for the monocular (lateral) part. Most fixations before pecking occur monocularly. A preference for one eye during pecking was not detected. During the courtship song, a male bird directs its head towards the female. The results are discussed in comparison with findings in pigeons and chickens
Bistum Sitten, Bischof Landrich an St. Maurice, Stift, Kapitel - 0.0.1234
No full textzu 09: anhängendes, dunkelbraunes Wsgl. d. Ausstell., Legende oben rts., unten u. lks. abgebrochen, Umschrift:...LANDRICVS...; zu 13: Bischof L>andrichº; Perg. leicht gedunkelt, Bleilinierung, Z.2 rts. über si v. Maurisiensis Wurmloch, Z.3 v. u. rts.: sariis v. adversariis auf Rasur, dgl. si quam, lezte Z. Mitte lks. piscopa v. episcopali auf Rasur.{'name': 'DFG', 'uri': 'dfg.png'
Activity-dependent plasticity in visual forebrain areas of the zebra finch
Get PDFRollenhagen A, Bischof H-J. Activity-dependent plasticity in visual forebrain areas of the zebra finch. Behavioural Brain Research. 1996;81(1-2):207-213
Bistum Sitten, Bischof Landrich an Erlach, Kloster - 29.5.1217
No full textzu09: Sgl. ab u. verloren, Einschnitt in der Plica vorh.; Art d. Kopie: 5N + 2Rs. + 3Pos.; zu13: Bischof L(andrich); zu16: starres Perg. gebräunt, fleckig; T. liniierung; Zeilenzählung in roter T. am linken Rd. dgl. auf der Plica links, die beiden leeren aber liniierten Zeilen in der Plica mitzählend. Einträge von roter T. auch auf der Rs. oben links u. unten rechts.;{'name': 'DFG', 'uri': 'dfg.png'
Contralateral projections of the optic tectum in the zebra finch (Taeniopygia guttata castanotis)
Get PDFBischof H-J, Niemann J. Contralateral projections of the optic tectum in the zebra finch (Taeniopygia guttata castanotis). Cell and Tissue Research. 1990;262(2):307-313.Efferent projections of the optic tectum of zebra finches were investigated by injection of the radioactive anterograde tracer 3H-proline. In addition to a variety of ipsilateral projections, some contralateral connections were found. Quantitative evaluation of the recrossing tecto-rotundal and nucleus subpraetactalis/nucleus interstitio-praetecto-subpraetactalis projection revealed that these connections are much stronger than previously believed. In contrast, the tecto-tectal projection is very weak, as has been shown previously. Further support for this comes from results obtained using injections of retrograde tracers. The role of the different projections in conveying information from the ipsilateral eye to the ectostriatum, the telencephalic end-station of the tectofugal pathway, is discussed
Spine morphology of neurons in the Avian forebrain is affected by rearing conditions
Get PDFRollenhagen A, Bischof H-J. Spine morphology of neurons in the Avian forebrain is affected by rearing conditions. Behavioral and Neural Biology. 1994;62(2):83-89.An area of the caudal forebrain of male zebra finches, the Archi-Neostriatum caudale (ANC), which is active during arousal (Bischof and Herrmann, 1986, 1988), shows rearing-dependent changes in neuron morphology (Rollenhagen and Bischof, 1991). We demonstrate here that rearing conditions also affect the shape of spines of one of the four ANC neuron types. This neuron type was examined in birds reared under five different conditions - in isolation (1), caged (2), in the aviary (3), and with social contact (4) or chasing (5) after an isolation period. Our results show that social experience determines the proportion of the three types of spines (thin, mushroom, and stubby) of the investigated neuron type. Rearing conditions and short social contact also affect the spine stem length of the thin spine type. Long-term isolation results in a reduction in number and elongation of shafts of thin spines, along with an increase of stubby-and mushroom-shaped spines. Short-term social contact or arousal enhances the number of mushroom- and thin-shaped spines and reduces the length of spine stems of thin spines. We suggest that isolation prevents the ANC neuron from reaching full development. The increase of mushroom and thin spine types due to social contact indicates that the stubby-shaped spines are replaced by, or transformed into, mushroom-shaped spines, and the mushroom-shaped spines are replaced by, or transformed into, thin spines. These results confirm and extend the experimental background for our hypothesis (Rollenhagen and Bischof, 1991) that social contact is necessary for development of normal morphology of ANC neurons
Arousal enhances [14C]2-deoxyglucose uptake in four forebrain areas of the zebra finch
Get PDFBischof H-J, Herrmann K. Arousal enhances [14C]2-deoxyglucose uptake in four forebrain areas of the zebra finch. Behavioural Brain Research. 1986;21(3):215-221.The activity pattern of the forebrain of male zebra finches was investigated by the [14C]2-deoxyglucose (2-DG) method in 4 different behavioral situations. (1) Sitting alone in the cage (control); (2) courtship by experienced birds; (3) first courtship of inexperienced birds (100 days of age), and (4) chasing the birds around the cage. The primary sensory areas (ectostriatum, field L) were active above background in each experiment. Vocal-motor control areas were at background activity (RA, HVc, MAN), or below background (area X), all unaffected by the type of experiment. In contrast, 4 different areas were active in Expts. 3 and 4, but not in 1 and 2: (a) part of the neostriatum intermedium; (b) part of the lateral neostriatum, both with adjacent parts of the hyperstriatum ventrale, (c) hyperstriatum accessorium and hyperstriatum dorsale, (d) a portion of the caudal neo/archistriatum. It is concluded that the enhanced activity of these areas is not due to distinct external stimulation or enhanced motor activity, but correlates with high arousal levels of the animals
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