Análisis descriptivo de la miología flexora y extensora del miembro anterior de Polychrus acutirostris (Squamata, Polychrotidae)

Moro, Silvia; Abdala, Virginia

doi:10.1590/s0031-10492004000500001

Cited by 19 publications

(41 citation statements)

References 4 publications

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“…and Phymaturus sp. -metacarpal bases II, III e IV; and P. acutirostris -metacarpals II, III e V. The insertion may occur in the phalanges, what is mostly observed in birds, however it was described inserting on the distal phalanges I e II, and we observed something similar in Iguana i. iguana, with it inserting also on the distal phalange III (ABDALA; DIOGO, 2010;CASALS et al, 2012;MEERS, 2003;ABDALA, 2004;2006;ROMÃO et al, 2013;ZAAF et al 1999). The proximal insertion on crocodilians and some lizards indicates a better positioning of the manus during the terrestrial locomotion.…”

Section: Discussionsupporting

confidence: 66%

“…and Phymaturus sp., in the distal head of the humerus. It insets on the humeral shaft, the mentioned lizards has some fibers inserting on the aponeurosis of m. flexor carpi ulnalis and pisiform bone (CASALS et al, 2012;LIMA et al, 2016;MEERS, 2003;ABDALA, 2004;2006;ROMÃO et al, 2013).…”

Section: Discussionmentioning

confidence: 99%

“…mississippiensis, C. siamensis, C. acutus, O. tetraspis, G. gangeticus, C. latirostris, Iguana i. iguana. In P. acutirostris the origin is shared with m. extensor carpi radialis, on the epicondyle (CASALS et al, 2012;LIMA et al, 2016;MEERS, 2003;ABDALA, 2004;2006;ROMÃO et al, 2013).…”

Section: Discussionmentioning

confidence: 99%

“…The nomenclature we used to identify and describe the muscles was based on Moro and Abdala (2004;2006) and Jenkins and Goslow (1983) about lizards, and Meers (2003) about crocodilians.…”

Section: Methodsmentioning

confidence: 99%

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Muscular anatomy of the pectoral girdle and forelimb of Iguana i. iguana (Squamata: Iguanidae)

Freitas¹,

Sabec-Pereira²,

Pereira³

et al. 2017

Biosci. J.

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ABSTRACT:Green iguana has arboreal and terrestrial habits. It is widely distributed in Central and South America, inhabiting several biomes in Brazil. Some researches were focused on this species, however, morphological information are still limited. With that in sight, we aimed to add data to the anatomical knowledge. Two post mortem specimen of Iguana i. iguana were acquired, donated by a scientific breeding, and dissected. To describe the muscles we refuted the skin and removed the fascias, individualizing the muscles. We identified the following muscles: pectoralis, deltoideus clavicularis, deltoideus scapularis, trapezius, latissimus dorsi, coracobrachialis brevis, coracobrachialis longus, serratus thoracis, levator scapulae, biceps brachii and triceps brachii. Some of them, like coracobrachialis brevis, present conservative anatomy, originating from the ventral surface of the coracoid and inserting onto the proximal humerus. Some, like trapezius and biceps brachii, are similar to other reptile species, trapezius takes its origin from the thoracodorsal fascia and biceps arises by two heads and inserts on the radial tuberosity. Deltoideus clavicularis and deltoideus scapularis share a common insertion tendon. Pectoralis varies its origin and divisions, however, the insertion always occur on the deltopectoral crest. Triceps brachii is comprised of four heads. Its long medial head originates via a tendinous arc, feature described only in crocodilians. We conclude that Iguana i. iguana forelimb musculature is similar to other reptiles, presenting its own characteristics that reflect its habits.

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Section: Discussionsupporting

confidence: 66%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

“…The nomenclature we used to identify and describe the muscles was based on Moro and Abdala (2004;2006) and Jenkins and Goslow (1983) about lizards, and Meers (2003) about crocodilians.…”

Section: Methodsmentioning

confidence: 99%

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Muscular anatomy of the pectoral girdle and forelimb of Iguana i. iguana (Squamata: Iguanidae)

Freitas¹,

Sabec-Pereira²,

Pereira³

et al. 2017

Biosci. J.

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“…In fact, as shown in Table 2, the vast majority of the individual pectoral muscles found in urodeles are present in lizards (e.g., at least 26 of the 29 Ambystoma pectoral muscles listed in that table are seemingly present in Timon). It should be noted that apart from the muscles listed in that table, other pectoral muscles may be eventually found in extant tetrapods: for instance, Shellswell and Wolpert (1977) have mentioned that some birds may have about 50 distinct muscles in the wing, a number that is significantly greater than the number of pectoral muscles found in tetrapods such as urodeles and lizards (see Table 2; see also Romer, 1922Romer, , 1924Romer, , 1944Howell, 1933aHowell, ,b, 1935Howell, , 1936aSullivan, 1962;George and Berger, 1966;Jarvik, 1980;Pough et al, 1996;Kardong and Zalisko, 1998;Gibbs et al, 2000Gibbs et al, , 2002Kardong, 2002;Moro, 2003, 2006;Moro and Abdala, 2004;Kisia and Onyango, 2005;Walthall and Ashley-Ross, 2006). We plan to provide, in a future work, a detailed account on the pectoral musculature of all the major tetrapod subgroups.…”

Section: Sarcopterygii (Table 2 and Figs 9-18)mentioning

confidence: 99%

Comparative anatomy, homologies and evolution of the pectoral muscles of bony fish and tetrapods: A new insight

Diogo

Abdala

2007

Journal of Morphology

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The Osteichthyes, including bony fishes and tetrapods, is a highly speciose group of vertebrates, comprising more than 42,000 living species. The anatomy of osteichthyans has been the subject of numerous comparative studies, but most of these studies concern osteological structures; much less attention has been paid to muscles. The most detailed comparative analyses of osteichthyan pectoral muscles that were actually based on a direct observation of representatives of various major actinopterygian and sarcopterygian groups were provided several decades ago by authors such as Howell and Romer. Despite the quality of their work, these authors did not have access to much information that is now available. In the present work, an updated discussion on the homologies and evolution of the osteichthyan pectoral muscles is provided, based on the authors' own analyses and on a survey of the literature, both old and recent. It is stressed that much caution should be taken when the results obtained in molecular and developmental studies concerning the pectoral muscles of model actinopterygians such as the teleostean zebrafish are discussed and compared with the results obtained in studies concerning model sarcopterygians from clades such as the Amphibia and/or the Amniota. This is because, as shown here, as a result of the different evolutionary routes followed within the actinopterygian and the sarcopterygian clades none of the individual muscles found, for example, in derived actinopterygians such as teleosts is found in derived sarcopterygians such as tetrapods. It is hoped that the information provided in the present work may help in paving the way for future analyses of the pectoral muscles in taxa from different osteichthyan groups and for a proper comparison between these muscles in those taxa.

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The Tendinous Patterns in the Palmar Surface of the Lizard Manus: Functional Consequences for Grasping Ability

Abdala

Manzano

Tulli

et al. 2009

The Anatomical Record

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In lizards, distinct patterns of the tendinous structures associated with the forearm flexors have been described. In most lizards, the m. flexor digitorum longus ends in a tendinous plate with an embedded sesamoid, from which tendons run to the terminal phalanx of each digit. This structure is known as the flexor plate. In many polychrotid lizards, however, the flexor digitorum longus muscle is continuous with individual tendons running to each digit, and no complete flexor plate is present. In most geckos, the flexor plate is reduced to a tendinous plate without sesamoid. To evaluate the consequences of these differences in morphology on locomotion and grasping, we compared the use of the fore-arm and hand in lizards exhibiting three different tendon patterns (Pogona vitticeps, an agamid with a well-developed flexor plate; Gekko gecko, a gekkonid with a flexor plate, but without an embedded sesamoid; Anolis equestris, a polychrotid without flexor plate, but showing independent tendons running to each digit) while moving on different substrates. We found that the presence of a flexor plate with sesamoid bone prevents digital flexion and creates a rather stiff palmar surface in P. vitticeps. This configuration makes it impossible for P. vitticeps to grasp narrow branches and results in a strongly impaired locomotor performance on narrow substrates. Both G. gecko and A. equestris can flex the palms of their hands and their fingers more extensively, and do so when moving on narrow substrates. We suggest that the reduction of the flexor plate in both G. gecko and A. equestris allows these animals to move effectively on narrow substrates. Anat Rec, 292:842-853, 2009. V V C 2009 Wiley-Liss, Inc.Key words: flexor plate; forearm muscles; grasping hand; lizards; palmar sesamoid; tendons All limbed tetrapods have flexor tendons in the palmar surface of the manus that connect the muscles of the forearm with the digits. These tendons emerge from the superficial (m. flexor carpi ulnaris; m. flexor carpi radialis), and deeper (m. flexor digitorum longus) muscles of the forearm. Each layer (superficial and deep) of these skeletal muscles exerts its actions on the bones of the hand by means of an independent set of tendons (Davis, 1964). In lizards, however, only the m. flexor digitorum longus sends flexor tendons to the digits. This muscle flexes the digits via five strong tendons that generally

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Análisis descriptivo de la miología flexora y extensora del miembro anterior de Polychrus acutirostris (Squamata, Polychrotidae)

Cited by 19 publications

References 4 publications

Muscular anatomy of the pectoral girdle and forelimb of Iguana i. iguana (Squamata: Iguanidae)

Muscular anatomy of the pectoral girdle and forelimb of Iguana i. iguana (Squamata: Iguanidae)

Comparative anatomy, homologies and evolution of the pectoral muscles of bony fish and tetrapods: A new insight

The Tendinous Patterns in the Palmar Surface of the Lizard Manus: Functional Consequences for Grasping Ability

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