Evans M H
Brain Res. 1980 Feb 10;183(2):329-40. doi: 10.1016/0006-8993(80)90468-0.
Stimulation of the brain stem of the anaesthetized rabbit, in the lateral hypothalamic area and the zona incerta 0.5-3 mm from the midline and a similar distance dorsal to the lateral mammillary nucleus, evoked vasoconstriction in the skin of the ear and of the hindpaw. Only weak and inconstant effects on muscle blood flow were evoked from this region of the brain stem. Muscle vasodilatation was obtained by stimulation of more medial regions of the brain stem, extending almost all the way from the supramammillary nucleus to the dorsal surface. This vasodilatation was not diminished by atropine. Alpha-adrenergic blocking agents diminished the cutaneous vasoconstrictor responses and also reduced or even reversed the bradycardia that could be evoked by hypothalamic stimulation.
刺激麻醉兔的脑干，刺激部位为下丘脑外侧区以及距中线0.5 - 3毫米、背侧至乳头体外侧核距离相似的未定带，可诱发兔耳和后爪皮肤血管收缩。仅对该脑干区域刺激可诱发对肌肉血流微弱且不稳定的影响。刺激脑干更内侧区域（几乎从乳头体上核一直延伸至背表面）可使肌肉血管舒张。这种血管舒张不受阿托品影响。α - 肾上腺素能阻断剂可减弱皮肤血管收缩反应，还可减轻甚至逆转下丘脑刺激所诱发的心动过缓。
