Macewen on brain abscess, 290 pus evacuation, 266 Macewen’s suprameatal triangle, 5 Malar tubercle, 4 Mania (acute) after brain injuries, 201 Mastoid antrum operations on, 269 surface-marking of, 5 Mastoid process displacement of, 108 exostoses of, 329 Mechanism of basic fractures, 73 Meningeal cysts, 203 Meningitis, 273 Mental condition in abscess of frontal lobe, 263 compression, 176 concussion, 170 irritation of the brain, 171 lateral sinus thrombosis, 283 meningitis, 279 tumours of the brain, 216 Middle meningeal artery, surface-marking of, 5 Middle meningeal hæmorrhage, 135 Morphia before and after operation, 11, 30 in cerebral concussion, 178 cerebral irritation, 128 trigeminal neuralgia, 313 Motor areas of cortex, 7 Motor speech area, 8 Multiple abscess of the brain, 247 Muscle grafts, 18, 234 Neuralgia hysterical, 310 major, 308 minor, 306 of inferior dental nerve, 308 infra-orbital nerve, 308 supra-orbital nerve, 309 Neurasthenia after head-injuries, 185 Neurectomy of the branches of the fifth nerve, 308 Nicholl on birth-fractures, 46 Ninth nerve, involvement of in basic fractures, 106 Nystagmus, 224 Occipital cephaloceles, 33 Occipital lobe lesions of, 164 tumours of, 222 Occipital sinus, surface-marking of, 4 Olfactory nerve, involvement of in basic fractures, 94 Opening of dura mater, 29, 119 Optic nerve, involvement of in basic fractures, 95 Optic neuritis in abscess of the brain, 254 lateral sinus thrombosis, 283 meningitis, 279 tumours of the brain, 216 Orbital aneurysm, 204 Orbital hæmorrhage, 90 Osteomata of the skull-bones, 325 Osteoplastic re-section of the skull, 25, 229 with decompression, 235