Notes summarising the muscles of facial expressions, including their innervation, origins, insertions and even some blood supply, which is a component of Head & Neck anatomy in dentistry. I wrote these notes myself when I was studying for my own exam and my notes helped me get a first (A) in my exa...
Group Muscle Origin Insertion Function Innervation Extra
Orbital group Orbicularis Oculi Medial palpebral Lateral palpebral Closes eye gently Temporal and
(Palpebral part) ligament raphe zygomatic branch of
Facial (VII)
Orbicularis Oculi MPL, Frontal bone Uninterrupted eclipse Closes eye forcefully Temporal branch of
(Orbital part) and maxilla Facial (VII)
Corrugator Supercilli Superciliary arch Skin of the eyebrow Draws eyebrow Temporal branch of
(medial) medially& Facial (VII)
downwards
Nasal group Nasalis (Transverse Maxilla Aponeurosis & Compresses nasal Facial (VII)
part) contralateral muscles aperature
Nasalis (Alar part) Maxilla Alar cartilage of nose Draws cartilage Facial (VII)
down and lateral
Procerus Nasal bone & Skin between Frowning Facial (VII)
cartilage eyebrows
Depressor septi Maxilla Nasal septum Pulls nose inferiorly Facial (VII)
Scalp group Occipitofrontalis Skin of eyebrows Galea aponeurosis Wrinkles forehead Temporal branch of
(Frontal belly) Facial nerve (VII)
Occipitofrontalis Occipital bone Galea aponeurosis Draws scalp Posterior auricular
(Occipital belly) backwards branch of Facial
nerve (VII)
Auricular Anterior, posterior Temporal fascia Into ear Forward, backwards Posterior auricular
and superior and elevate ear branch of Facial
auricular nerve (VII)
Oral Oribicularis oris Maxilla & Mandible Ellipse around lips Closes/protrudes lips Buccal branch of
– whistling Facial nerve (VII)
Buccinator Maxilla, Mandible Blends in with Presses cheek Buccal branch of
and orbicularis oris against teeth Facial nerve (VII)
pterygomandibular
raphe
Risorius Fascia over masseter Skin at mouth corner Retracts corner of Buccal branch of
mouth – smiling Facial nerve (VII)
Mentalis Mandible inferior to Skin of chin Raises/protrudes Marginal mandibular
incisors lower lip – wrinkles branch of Facial
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