Anatomy
The opponens pollicis, or flexor ossis metacarpi pollicis, is named from its action, as it helps in opposing the thumb to the other fingers and at the same time is a flexor of the first metacarpal bone. It is a short, thick, triangular sheet.
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Superficial fascia and fascia lata
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The abductor pollicis - named from its action upon the thumb - is a small thi triangular sheet.
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The pectineus - named from pecten (=pubes) on account of its origin from the bone - is a quadrilateral sheet.
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The abductor minimi digiti - named from its action - is fusiform and somewhat flattened.
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The sartorius- named somewhat erroneously from sartor, a tailor, because it has been supposed to be the muscle by which the cross-legged sitting posture is produced- is a long, ribbon- shaped muscle slightly fusiform at the two ends.
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The flexor brevis minimi digiti- named from its action - is small and fusiform.
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The psoas parvus - a small muscle, only occasionally present, named from its positic in the loins and its small size - is fusiform and somewhat flattened.
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The opponens minimi digiti (= flexor ossis metacarpi minimi digiti) - named from its action - is a triangular fanshaped sheet.
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The psoas, or psoas magnus (french: muscle psoas ou grand psoas) - named from the Greek word meaning the muscles of the loins - is thick, rounded, and fusiform.
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The coracobrachialis muscle (French: muscle coraco-brachial) - named from its attachment to the coracoid process and he upper arm braclhium - is a cylindrical muscle, but somewhat fusiform at the extremities.
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The iliacus - named from its attachment to the ihum - is a thick, triangula sheet.
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The spleen is a large blood-vascular