Practical human anatomy [electronic resource] : a working-guide for students of medicine and a ready-reference for surgeons and physicians . 1 and 2, of Figure 14 (page 318), andreflect a flap as indicated. Care must be taken to reflect the skin only, thatthe vessels and nerves of the subcutaneous plane may be left in situ. As aguide for the hairy portion of the scalp, the roots of the hairs should be ex-posed projecting from the interior of the flap. 1. Subcutaneous Tissue.—This plane of the scalp differsfrom the same tissue of other regions*: in being very dense ;and in its intimate blending
Practical human anatomy [electronic resource] : a working-guide for students of medicine and a ready-reference for surgeons and physicians . 1 and 2, of Figure 14 (page 318), andreflect a flap as indicated. Care must be taken to reflect the skin only, thatthe vessels and nerves of the subcutaneous plane may be left in situ. As aguide for the hairy portion of the scalp, the roots of the hairs should be ex-posed projecting from the interior of the flap. 1. Subcutaneous Tissue.—This plane of the scalp differsfrom the same tissue of other regions*: in being very dense ;and in its intimate blending with the skin, exteriorly, and themusculo-aponeurotic layer, interiorly. Dissection.—Trace through the frontal area of the subcutaneous tissue thefrontal artery, the supratrochlear nerve, and the anterior branch of the super-ficial temporal artery. Expose the surface of the frontal portion of the occipito-frontalis muscle. 318 HEAD AND NECK. 2. Frontal Artery, Plate 177.—This artery presents superi-orly to the internal portion of the supra-orbital region, whereit has a superior course exteriorly to the occipito Fig. 14. 3. Supratrochlear Nerve.—This small nerve appears inter-nally to, and parallel with, the last-described artery ; it per-forates the muscle to the same plane as the artery. 4. Superficial Temporal Artery.—The anterior branch ofthis artery (vena comes) is projected into the superior portionof the frontal area of the scalp. Dissection.—Cut out the supra-orbital artery and nerve from the interiorof the frontal portion of the occipito-frontalis muscle (Plate 177). Trace thenerve branches to where they perforate the muscle to reach the subcutaneous-tissue plane, and follow them, superiorly and posteriorly, into the anterior por-tion of the vertex area of the scalp. SCALP. 319 5. Supra-orbital Artery.—This small artery emerges fromthe orbital cavity, at the supra-orbital notch or foramen, intothe plane interiorly to the occipito-frontal
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