One-third, two-thirds: relationship of the radial nerve to the lateral intermuscular septum in the arm.

The radial nerve penetrates the lateral intermuscular septum of the arm before dividing into deep and superficial branches. It may be encountered in both anterior and posterior approaches to the humerus. An ability to accurately predict the point at which the nerve pierces the septum would be valuable during surgery in the arm, and would facilitate planning an approach to exploring the radial nerve after fractures of the distal humeral shaft.

True aneurysm of the left ventricle: a case report and literature review.

Pathologic specimens acquired by anatomy departments may be of fundamental anatomical and clinical interest. In this report we describe a true aneurysm of the left ventricle and we review the relevant clinical records of the patient. A detailed review of the literature on ventricular aneurysms is presented with emphasis on particular aspects of cardiac anatomy.

Contribution of cranial nerve ganglia to innervation of the walls of the rat external acoustic meatus.

The retrograde neuronal tracer, fluorogold, was used to determine the relative contributions of neurons in selected cranial nerve ganglia to the somatosensory innervation of the external acoustic meatus in the rat. Frozen sections from the trigeminal (semilunar), facial (geniculate), glossopharyngeal (superior petrosal) and vagal (jugular) nerve ganglia were examined by epifluoresence microscopy 10 to 14 days after application of the tracer dye fluorogold to the superior, inferior, anterior and posterior walls of the external acoustic meatus. The anterior wall of the canal makes a large contribution to the trigeminal ganglion and a lesser contribution to the other 3 ganglia.

Case report: bilateral occurrence of a chondroepitrochlearis muscle.

The chondroepitrochlearis is an extremely rare muscular anomaly. Bergman et al. (1988) in their book on anatomical variations refer to ‘costoepitrochlearis, chondroepitrochlearis, or chondrohumeralis’ and describe the anomaly as a muscular slip which arises from one or more ribs, crosses the axilla, and inserts into the median intermuscular septum or medial humeral epicondyle.