Frequency and characterization of the accessory heads of the biceps brachii: A multicentric cadaveric study.

Lira-Bandeira, W G; Montello, M B; Moretti, E C; Da Silva, I B; Lemos, G A; Oliveira, J B; Da Silva, J B; De Oliveira, E G

Lira-Bandeira, W G; Montello, M B; Moretti, E C; Da Silva, I B; Lemos, G A; Oliveira, J B; Da Silva, J B; De Oliveira, E G.

Lira-Bandeira WG; Department of Morphology, Federal University of Rio Grande do Norte, Natal (RN), Brazil. Electronic address: wiginio.gabriel.bandeira@ufrn.br.
Montello MB; Department of Morphology, Federal University of Rio Grande do Norte, Natal (RN), Brazil.
Moretti EC; Human Anatomy Sector of the Institute of Biological and Health Sciences, Federal University of Alagoas, Maceió (AL), Brazil.
Da Silva IB; Department of Morphology, Federal University of Paraiba, João Pessoa (PB), Brazil.
Lemos GA; Human Anatomy Sector of the Institute of Biological and Health Sciences, Federal University of Alagoas, Maceió (AL), Brazil.
Oliveira JB; Department of Anatomy, Biosciences Center, Federal University of Pernambuco, Recife (PE), Brazil.
Da Silva JB; Department of Morphology, Federal University of Paraiba, João Pessoa (PB), Brazil.
De Oliveira EG; Department of Physiology and Pharmacology, Federal University of Pernambuco, Recife (PE), Brazil.

Morphologie ; 108(362): 100776, 2024 Mar 30.

Article en En | MEDLINE | ID: mdl-38555754

ABSTRACT

ABSTRACT

PURPOSE:

The biceps brachii muscle (BBM) is a large and thick muscle on the ventral portion of the upper arm. The scientific literature reports the existence of extra heads.

OBJECTIVE:

The present work investigated the frequency of occurrence of BBM accessory head(s) in four different Anatomy Laboratories at universities in Northeast Brazil. MATERIAL AND

METHODS:

Once the upper limbs with an anatomical variation of the BBM heads were identified, the accessory head was evaluated for morphometric characterization (the length, width, and thickness).

RESULTS:

The sample consisted of 249 upper limbs and the outcomes were 26 members with BBM accessory heads (10.44% of the total sample). Among the 26 members studied was found a single accessory head in 22 (84.62%), two accessory heads in 3 (11.54%), and three accessory heads in 1 (3.85%). BBMs with one, two, and three accessory heads were found, with different origins. The average length, width, and thickness of these accessory heads were 169.39mm, 10.25mm, and 3.39mm, respectively.