Psoas n. (Anat.) An internal muscle arising from the lumbar vertebrae and inserted into the femur. In man there are usually two on each side, and the larger one, or great psoas, forms a part of the iliopsoas.
... localised obturator paralysis. On the other hand, anaesthesia or hyperaesthesia in the area of distribution of the lumbar nerves in the groin, the external cutaneous and the long saphenous in the thigh, were not uncommon. Hyperaesthesia developed in more than one case in which injury to the psoas had led to haemorrhage into the ... — Surgical Experiences in South Africa, 1899-1900 • George Henry Makins
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