1. Quelle est la nature du sternum dans la paroi thoracique?
2. Quelle pièce osseuse constitue le pivot central de la cage thoracique selon Galien?
3. Quelle est l’origine de l’artère thoracique interne ?
Paroi thoracique — rôle ?
Protection, fixation, mécanique respiratoire.
Sternum — composition osseuse?
Manubrium, corps, processus xiphoïde.
Muscles diaphragme — innervation ?
Nerf phrénique (C3-C5).
Côtes vraies — fixation?
Se fixent directement au sternum.
Courbure d’enroulement — rôle?
Confère la forme hélicoïdale côtes.
Courbure de torsion — effet?
Modifie l’orientation des côtes.
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