Brain superior

Figure 9.1 The distribution of 5-HT neurons in the brain. The cell bodies are clustered in nuclei (B1-B7) in the pons/upper medullary regions of the brainstem. The rostral cluster ( superior group ) project mainly to forebrain areas while the caudal ( inferior ) group projects mainly to the medulla and spinal cord. Collectively, these neurons innervate most regions of the central nervous system...

The CSF flows through the ventricles, downward through the central canal of the spinal cord, and then upward toward the brain through the subarachnoid space that completely surrounds the brain and spinal cord. As the CSF flows over the superior surface of the brain, it leaves the subarachnoid space and is absorbed into the venous system. Although CSF is actively secreted at a rate of 500 ml/day, the volume of this fluid in the system is approximately 140 ml. Therefore, the entire volume of CSF is turned over three to four times per day. 

Figure 6.2 The location and distribution of the histamine-containing neurons in the brain. These neurons are localized in the tuberomammiUaiy nucleus within the posterior hypothalamus and send projections throughout the brain. Abbreviations Hi, hippocampus Hy, hypothalamus IC, inferior colliculus OB, olfactory bulb SC, superior colliculus SI, substantia innominata St, striatum TH, thalamus TMN, tuberomammillary nucleus. Adapted from Watanabe Yanai (2001).

Matus AI. Ultrastructure of the superior cervical ganglion fixed with zinc iodide and osmium tetroxide. Brain Res 1970 17 195-203. 

In general, the introduction of antihypertensive agents acting on the vasomotor center in the brain appears to be a major advance in the treatment of hypertension. The well balanced hemodynamic effect is far superior to what is observed with inhibition of sympathetic transmission at peripheral sites. Orthostatic hypotension is no longer a problem. It is predicted that pharmacologic progress in this line of compounds will make further contributions to our antihypertensive armamentarium. 

Testimony was further taken upon the question of any radical differences existing between the Asiatic and Caucasian races, and in the evidence will be found much valuable information upon this point peculiarly interesting to the ethnologist. The deduction from the testimony taken by the committee on this point would seem to be that there is not sufficient brain capacity in the Chinese to furnish motive power for self-government. Upon the point of morals, there is no Aryan or European race which is not far superior to the Chinese as a class.49... 

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