Anterolateral system-the anterolateral system is located just internal to the brachium of the inferior colliculus in the lateral portions of the midbrain tegmentum. this tract conveys pain and thermal sensations from the contralateral side of the body excluding the face. corticospinal fibers are located in the crus cerebri, the mesencephalic tract at the lateral edge of the periaqueductal(central) grey, and the central tegmental tract is, as its name indicates, in the central part of the tegmentum. oculomotorfibers within the midbrain leave the nucleus, arch through the tegmentum, and exit on the medial surface of the basis pedunculi into the interpeduncular cistern.(p.130133)
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