Class-book of physiology : for the use of schools and families : comprising the structure and functions of the organs of man, illustrated by comparative reference to those of inferior animals . , The spinalcord, d, The facial nerve, the principal motor nerve of the face, e, The brachial plexus,a net-work of nerves, originating by several roots from the spinal cord, and going to sup-ply the arm.—From this plexus proceed—/, the scapular nerve; g, the median nerve; A,the ulnar nerve; i, the musculo-spiral nerve ;j, the intercosto-humeral (nerve of Wrisberg).From the spinal cord proceed—the interc
Class-book of physiology : for the use of schools and families : comprising the structure and functions of the organs of man, illustrated by comparative reference to those of inferior animals . , The spinalcord, d, The facial nerve, the principal motor nerve of the face, e, The brachial plexus,a net-work of nerves, originating by several roots from the spinal cord, and going to sup-ply the arm.—From this plexus proceed—/, the scapular nerve; g, the median nerve; A,the ulnar nerve; i, the musculo-spiral nerve ;j, the intercosto-humeral (nerve of Wrisberg).From the spinal cord proceed—the intercostal nerves, k, k, running between the ribs; thenerves forming the luobar plexus, I, from which the front of the leg is supplied; thoseforming the sacral plexus, m, which supplies the back of the leg. The chief branch ofthe sacral plexus is the great sciatic nerve, n, which divides into the tibial nerve, o, theperoneal or fibular nerve, p, and many other branches. The nerves seen on the right sideof the figure, are the ramifications of the sub-cutaneous nerves, branching beneath V\e•kin, in which they are finally lost. Som« jf th6 tuperficial veins nre also represonfecL Fie. 1. THE NERVOUS SYSTEM. 149 more acute in proportion as the face is more projectingand the forehead more retreating; while it will be nearera right angle, if the forehead be prominent and the muzzleprojecting but little. Hence, the facial angle will indicatethe proportion which the brain bears to the face. 316. This angle is more open in man than in any otheranimal, and it varies greatly in the various races of difference between the facial angle of the Europeanand American head, and that-of the negro, is seen in and 50. In the one, it is about eighty degrees, and inthe other about seventy. In monkeys, it varies fromabout sixty-five to thirty degrees, and as we descend stilllower, it becomes still more acute. CONNECTION OF THE MIND WITH THE BODY. 317. The brain, as appears from what
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectphysiologicalprocess
