{'fraction_non_alphanumeric': 0.01636520241171404, 'fraction_numerical': 0.0, 'mean_word_length': 5.0837696335078535, '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}}
Effect of various lesions in the nucleus tractus solitarii of the rat on blood pressure, heart rate and cardiovascular reflex responses.

The inhibitory role of the nucleus tractus solitarii (NTS) in cardiovascular control was studied in the rat. Bilateral electrolytic lesions of the dorsal medulla oblongata, located in the NTS, acutely caused hypertension and tachycardia. Effective sites were at the level of the obex and just rostral and caudal of this level. More rostrally or more caudally located lesions were ineffective in changing blood pressure and heart rate. The ascending or descending pathways from the NTS structures in the dorsal midline appear not to be essential. Frontal transections rostral of the obex or lesions and transections in the commissural part of the NTS did not block the hypertension caused by lesions at the level of the obex. The latter lesions completely blocked the reflex-induced changes of heart rate caused by administration of bradykinin, angiotensin II and the diving reflex bradycardia. The hypertension was associated with a marked increase in plasma renin activity and plasma adrenaline concentration. Adrenalec...