Sibson groove

Sib·son groove

(sib'sŏn), a groove occasionally seen on the outer side of the thorax formed by the prominent lower border of the pectoralis major muscle.

Sibson,

Francis, English anatomist, 1814-1876. Sibson aortic vestibule - the anterosuperior portion of the left ventricle of the heart immediately below the aortic orifice. Synonym(s): aortic vestibuleSibson aponeurosis - Synonym(s): suprapleural membraneSibson fascia - Synonym(s): suprapleural membraneSibson groove - a groove occasionally seen on the outer side of the thorax, formed by the prominent lower border of the pectoralis major muscle.Sibson muscle - an occasional independent muscular fasciculus between the scalenus anterior and medius and having the same action and innervation. Synonym(s): scalenus minimus muscle