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Glossary of Anatomy - Necturus Musculature (Detail)

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pectoralis
Origin: linea alba and coracoid cartilage
Insertion: humerus
Function: adducts forelimb
procoracohumeralis
Origin: procoracoid cartilage
Insertion: humerus
Function: draws humerus craniad
supracoracoidus
Origin: coracoid cartilage
Insertion: humerus
Function: adducts forelimb
branchiohyoideus
Origin: first branchial arch
Insertion: ceratohyal cartilage
Function: moves branchial arches and hyoid
geniohyoid
Origin: medial mandible
Insertion: second basibranchial cartilage
Function: depresses lower jaw and draws hyoid cranially
interyhoideus
Origin: fascia covering the branchiohyoideus
Insertion: median raphe
Function: elevates floor of throat
intermandibularis
Origin: rami of mandible
Insertion: median raphe
Function: elevates floor of throat
rectus cervicus
Origin: rectus abdominus
Insertion: branchial cartilages
Function: retracts lung and lowers head
coracobrachialis
Origin: coracoid cartilage
Insertion: humerus
Function: adducts forelimb
triceps brachii
Origin: glenoid fossa, humerus, and coracoid cartilage
Insertion: ulna
Function: extends forearm
levator mandibulae anterior
Origin: frontal and parietal bones
Insertion: lateral dentary
Function: elevates lower jaw
levator mandibulae posterior
Origin: frontal and parietal bones
Insertion: lateral dentary
Function: elevates lower jaw
dorsalis scapulae
Origin: suprascapular cartilage
Insertion: humerus
Function: elevates the forelimb
latissimus dorsi
Origin: fascia of epibranchial muscles
Insertion: shoulder and proximal end of humerus
Function: draws humerus caudad
dorsalis trunci
Origin: myosepta and transverse processes of vertebrae
Insertion: myosepta and transverse processes of vertebrae
Function: flexes the vertebral column laterally
external oblique
Origin: transverse processes of trunk vertebrae
Insertion: connective tissue of rectus abdominus
Function: compresses the coelom and flexes and rotates the trunk
rectus abdominis
Origin: anterior margin of puboischiac plate
Insertion: rectus cervicus
Function: flexes the trunk ventrally
pubo-ischio-femoralis externus
Origin: puboischiac plate
Insertion: femur
Function: adducts the hindlimb
pubo-ischio-tibialis
Origin: posterior puboischiac plate
Insertion: tibia
Function: adducts the hindlimb

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