{'fraction_non_alphanumeric': 0.022193211488250653, 'fraction_numerical': 0.0013054830287206266, 'mean_word_length': 5.185483870967742, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Angiographic demonstration of the meningeal branch of the posterior cerebral artery.

The tentorial arteries arise from three main sources [1]. The first is the cavernous segment of the carotid artery. The meningohypophyseal trunk gives rise to the basal tentorial artery (artery of Bermasconi-Cassanari) , and the inferior cavernous sinus artery gives rise to the marginal tentorial artery. The second source is the meningeal branch of the superior cerebellar artery. The third is the meningeal branch of the posterior cerebral artery (PCA, artery of Davidoff and Schechter), which has rarely been identified on angiographic studies. This report represents the first angiographic demonstration of the origin and the proximal part of the meningeal branch of the PCA.