Anatomy, physiology and hygiene . Hard mother ; called dura because of its great resistance, andmater because it was believed to give rise to every membrane of thebody. — Dunglison, 3Iedical Dictionary. 2 Delicate mother. 3 A name originally applied to delicate membranes resembling spiderswebs. The term arachnoid is from a Greek word, meaning spider. 4 These are sometimes spoken of as i\w fore-brain, mid-brain, and hind-brain. 6 oblong pith or marrow. It is sometimes called the bulb,oblong cord, or spinal bulb. 280 THE NERVOUS SYSTEM. the smallest part, and is the broadened commencement o
Anatomy, physiology and hygiene . Hard mother ; called dura because of its great resistance, andmater because it was believed to give rise to every membrane of thebody. — Dunglison, 3Iedical Dictionary. 2 Delicate mother. 3 A name originally applied to delicate membranes resembling spiderswebs. The term arachnoid is from a Greek word, meaning spider. 4 These are sometimes spoken of as i\w fore-brain, mid-brain, and hind-brain. 6 oblong pith or marrow. It is sometimes called the bulb,oblong cord, or spinal bulb. 280 THE NERVOUS SYSTEM. the smallest part, and is the broadened commencement ofthe spinal cord (Fig. 90). These three parts of the brain. cer - - - Fig. Section of Brain. CE, cerebrum, left , cerebellum, left portion. MO, medulla , spinal cord. are connected with one another, and all contain bothwhite and gray matter. 303. The Size and Weight of the Brain depend somewhaton the size of the individual, but they also bear consid-erable relation to his intellectual capacity (a). In thelower animals the cerebellum and the ganglia at the baseof the brain are the largest; but in the higher animalsthe cerebrum, as a rule, increases in size in proportionto the degree of intelligence. In man the size is verymuch greater in proportion to that of the entire body thanin any of the lower animals. The quality of the brainmaterial is also undoubtedly a matter of importance, for THE NERVOUS SYSTEM. 281 the brains of some very intelligent persons have beenfound to be comparatively small. 304. The Cerebrum is rounded upon its upper and lateralsurfaces, where its shape conforms to that of the skull,whi
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