British medical journal . more remote parts of the body. Thus, Headhas shown that disease of the thoracico-abdominal viscerareceiving sensory branches from the vagus is apt to giverise to referred tenderness and pain in what he terms thedorsal area of the head, owing, it is supposed, to theexistence of a peculiarly close connexion between thecentres of the vagi and the fifth nerves. This dorsal area (Fig. 4) is bounded on eitherside bj a line which, start-ing from the nose, followsthe lower line of the bonyorbit to the upper part ofthe insertion of the ear,thence dipping down in acurved line t
British medical journal . more remote parts of the body. Thus, Headhas shown that disease of the thoracico-abdominal viscerareceiving sensory branches from the vagus is apt to giverise to referred tenderness and pain in what he terms thedorsal area of the head, owing, it is supposed, to theexistence of a peculiarly close connexion between thecentres of the vagi and the fifth nerves. This dorsal area (Fig. 4) is bounded on eitherside bj a line which, start-ing from the nose, followsthe lower line of the bonyorbit to the upper part ofthe insertion of the ear,thence dipping down in acurved line to the occipitalprotuberance. It is sub-divided into the fronto-nasal, froutotemporal, tem-poral, vertical, parietal, andoccipital areas (seediagram).Atfectious of the tho-racico-abduminal visceramay, it is vrell known, causereflex tenderness aud painin correlated areas of thebody wall. Now, when thetenderness and paiu in anyof these areas reach acertain intensity, similarto appear in a correlatedof the head, the relation,. Fig. 4.—Diagram showingHeads dovsal area of tbobej^d, mapped out intosub-areas, fs-= T=f Lonto-temporal. pain tenddorsal area forehead;with the tem- tendcrness and portion of the broadly speaking, being such that the higher the area in the trunk, the more forward is the correlated area on the head |H. Head). Thus, the upper thoracic areas are associated with areas over the nose aud the seventh, eighth, and ninth thoracic poral, vertical, aud parietal regions respectively, and the tenth thoracic wdth the occipital region. One of the most fretiueut of associations is that between the seventh thoracic aud the temporal area. Thus, disease of the upper part of the stomach, the base of the lung, or the mitral valve, tends to give rise to pain and tenderness not only in the seventh thoracic area on the truuk, but in the temporal area also. ? 4. Lastly, in explauation of the frequency of headache,account has to be taken of the close rounexiou
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectmedicine, bookyear185
