Medicine.

Date:
[1919?]
Catalogue details

Licence: In copyright

Credit: Medicine. Source: Wellcome Collection.

    429/454 (page 393)
    dysphagia, and loss of taste in the posterior third of the tongue. It is never involved alone. TENTH NERVE—VAGUS OR PNEUMOGASTRIC. What is the Nature of this Nerve ? It contains both motor and sensory fibres, and has a very extensive distribution, including, through its lowest roots of origin, motor fibres for the levator palati and larynx, and inhibitory fibres for the heart. Mention sotm of the Conditions in lohvii it is affected. 1 ntra-cranial lesions may affect it totally or partially. In the neck, tumour or aneurysm may implicate it, or it may be involved in injuries. In the thorax it may be compressed by mediastinal tumour or aneurysm. It may take part in peripheral neuritis as from alcohol, lead, or arsenic, post- cliplitheritic or post-influenzal, or it may be paralysed in diseases of medulla, and disseminated sclerosis. Describe tlie Symptoms of Vagal Paralysis. These naturally vary with the site of the lesion. If the whole of one vagus trunk be affected there is unilateral paralysis of the palate and larynx, with unilateral anaesthesia of larynx. If both vagi be paralysed, the above effects will be bilateral, and in addition tachycardia and cardiac irregularity occur. Respiration is slow and irregular, and gastric symptoms are liable to occur, e.g. gastric dilatation, vomiting, pain, and abolition of hunger and thirst sensations. Laryngeal paralysis has been considered in detail in Part IV. (p. 252). ELEVENTH OR SPINAL ACCESSORY NERVE. What are the Results of Paralysis of this Nerve ? It is exclusively a motor nerve, and it supplies the sterno- mastoid muscle, and part of the trapezius. Hence there is