VANESSA CHIAPARINI MARTIN

AUTHOR:  VANESSA CHIAPARINI MARTIN
TITLE: ANATOMY OF THE THIGH AND LEG OF THE Alouatta belzebul

ADVISOR:  Prof. Dr. KLEBER FERNANDO PEREIRA
DEFENSE DATE: 07/19/2019

ABSTRACT

The Alouatta belzebul known as howler monkeys has a wide geographical distribution. They are discrete animals with slow movements, spending more than 70% of their time resting due to their fundamentally folivorous diet. The present study aims to describe the macroscopic anatomy of the A. belzebul thigh, such as muscular origin and insertion, irrigation and innervation of its structures. Seven adult, lesion-free A. belzebul specimens of different ages and genders were used. These animals were assigned by the Fauna - Belo Monte Scientific Rescue and Utilization Project, governed by the IBAMA process # 02001.001848 / 2006-75. This project was submitted for approval by the Committee on Ethics in Animal Experimentation - CEUA- UFG - protocol n. 083/17. The preparation, conditioning and dissection were performed in the Human Anatomy and Comparative Laboratory of the Federal University of Goiás (UFG). After dissection, it was observed that the muscles of the thigh and leg of A. belzebul are: tensor of the fascia lata, sartorius, vastus lateralis, vastus medialis, vastus medialis, long adductor, short adductor, pectinus, gracilis, biceps femoris, semitendinosus, semimembranosus, supplied by the femoral artery and sciatic nerve and its ramifications, gastrocnemius, soleus, popliteum, posterior tíbialis, anterior tíbialis, long flexor of the fingers, long hallux flexor, long and short fíbularis, accessory extensor, extensor digitorum longus of hállux. Similar to the observations made in A.belzebul, we find the similarity between Sapajus libidinosus, chimpanzees and baboons, supposedly both of them quadruped, to exhibit semi-biped and arboreal behavior. Thus, this study may support new research and diagnosis in improving the understanding of the anatomy of these primates.