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. 2015 Feb 23;10(2):e0117730. doi: 10.1371/journal.pone.0117730

Fig 3. Dissection photos of the masseter muscle in lateral view showing fibre direction.

Fig 3

(A) The most superficial layer of the masseter showing the fibre direction of the internal and external superficial masseter; (B) External superficial masseter removed to reveal the internal superficial masseter; (C) Part of the internal superficial masseter pulled back to reveal the fascia that partially separates the internal superficial masseter at its origin; (D) Internal and external superficial masseter removed to reveal the posterior and anterior deep masseter.