Minor Helical Muscle

Description

Running along the anterior margin of the auricular helix, the minor helical muscle (musculus helicis minor) is isolated and highlighted against the underlying elastic cartilage of the pinna. From this encompassing outer-ear perspective, its small, superficial muscle fibers sit immediately deep to the skin and superficial to the scapha and helix, with the conchal bowl positioned more medially and posteriorly. Adjacent auricular landmarks, including the crus of the helix and the antihelix, provide orientation for this slender vestigial slip. Small cutaneous branches and the plane of dissection around the auricle are suggested by the exposed soft tissue texture. Although the helicis minor contributes little to voluntary auricular movement in most adults, it matters because it defines a surgical and injection plane on the lateral auricle where skin, perichondrium, and cartilage lie in close apposition. Precise appreciation of this relationship helps when teaching auricular hematoma and perichondritis: blood or infection tracking between perichondrium and cartilage compromises cartilage nutrition, predisposing to deformity (cauliflower ear) if drainage and compression are delayed. Nerve awareness is practical here too, as regional anesthesia for laceration repair often targets the great auricular nerve and auriculotemporal nerve branches supplying the auricular skin. Use this plate in gross anatomy and head and neck modules to distinguish intrinsic auricular muscles from the larger extrinsic auricular muscles (auricularis anterior, superior, posterior) and to reinforce the concept of elastic cartilage covered by tightly adherent perichondrium. It also fits surgical education on auricular laceration repair, hematoma management, and otoplasty planning where surface landmarks must be correlated with the subdermal anatomy. Anatomical accuracy verified by SciePro's Medical Advisory Board.