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Figure 3. A, Camera lucida drawings of serial frontal sections showing the distribution of DA neurons (small open circles) in the hypothalamus
(Hy) and infundibulum (In) of a stage 44 embryo. From rostra1 (top left) to caudal (bottom right), the DA neurons form a coherent, continuous
cell cluster. B-D, Examples of DA neurons at different regions of the hypothalamus. B, Photomicrograph of a rostral DA neuron (e.g., in the first
section of the top row in A) located in the intermediate zone. Note the laterally oriented axon. C, DA neurons in the middle region of the
hypothalamus (e.g., the last section of the top row in A) form a coherent cell cluster. D, Caudally in the infundibulum (e.g., the last sections in the
bottom row of A) DA neurons are restricted to the dorsolateral margin. Scale bars: A, 100 pm; B-D, 25 um. |
