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The fluorescent retrograde tracers Rhodamine B Isothiocyanate (RITC) and Fast Blue (FB) were injected either into the thalamic nucleus rotundus or into the complexus neck muscle in pigeons. Both in the rotundal and the peripheral motor preparations RITC yielded a 3-5 times larger number of afferent ipsilateral neurones than FB. While RITC additionally(More)
The Herbst corpuscles (HCs) of the pigeon's wing were investigated both histologically and electrophysiologically. All HCs found in the wing were lamellated, basic type corpuscles without any specialized structures. Their lengths ranged from 67 to 853 μm (mean = 310 μm). Unexpected findings were their large number (about 1000 in the manual part of the(More)
The vibrational sensitivity of awake pigeons was tested with the heart rate conditioning method. This method proved to be a very sensitive instrument for the behavioural measurement of the pigeon's sensitivity to mechanical stimuli. Sine wave vibrational stimuli between 50 and 2000 Hz were applied to the 1st, 7th and 16th primary feathers of the wing. The(More)
As a first step towards the analysis of the neural control of pecking behaviour in the pigeon, the cell bodies of neck muscle motoneurons were localized and their somatotopic organization in the cervical spinal cord examined. Fluorescent tracers were injected into single neck muscles and labelled motoneuron cell bodies identified. Labelled perikarya were(More)
Given the failure of the ablation method to identify the neural structures/systems that are crucial for cross-modal recognition (CMR) and for tactile discrimination performance (TDP), we injected radioactive 2-deoxy-[14C]glucose (2-DG) into monkeys trained to a high level of CMR or TDP. Nine monkeys were trained to recognize in one sense-modality, to a(More)
binocular overlap. Figure 1 shows the response in such an arrangement: upon changing the plane of the E-vector of linearly polarized light, the response is modulated almost sinusoidally, a maximal response being elicited if the Evector is parallel to the vertical (sagittal) plane, and minimal if it is oriented horizontally. These orientations for maximal(More)
Unilateral removals of the posterior insula or of the second somatic sensory projection area (SII) were made in respectively 8 and 6 monkeys. These animals were divided into a 'contralateral' group of 7 with removals from the hemisphere opposite to the preferred hand; and an 'ipsilateral' group of 7 animals with removals from the hemisphere on the same side(More)
Personal experience gained with functionally stable osteosynthesis after a Le Fort-I osteotomy and segmental osteotomies of the upper jaw are dealt with. Surgical interventions were performed on 40 patients: 7 cases of Le Fort-I osteotomy, 21 cases of Le Fort-I osteotomy with an additional segmental osteotomy, and 17 cases of segmental osteotomies. The(More)