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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)
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)
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