Muscles of Facial Expression (Parts, Origin, Insertion, Function) 

Content
Introduction 0:00
Division of Facial Muscles 0:48
Muscles of the Scalp: 1:32
Muscles around the Orbital Opening: 2:13
Muscles around the Oral Opening 4:41
Muscles of the Nasal Opening: 8:06
Muscles around the Ear Opening: 9:12
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Division of Facial Muscles:
- Division of Facial Muscles
- Muscles of the Scalp
- Muscles around the Eye Opening
- Muscles around the Oral Opening
- Muscles of the Nasal Opening
- Muscles around the Ear Opening
- All of them Insert at the skin
- All are innervated by the facial nevre
- All come from the 2nd Pharyngeal Arch during development
Muscles of the Scalp:
- Occipitofrontal Muscle (Musculus Occipitofrontalis)
○ Occipital Belly (Venter Occipitalis)
§ Origin: Highest Nchal Line (Linea Nuchalis Superior)
§ Insertion: Epicranial Aponeurosis (Gales Aponeurosis)
○ Frontal Belly (Venter Frontalis)
§ Origin: Epicranial Aponeurosis (Galea Aponeurosis)
§ Insertion: Skin of Eyebrows
Muscles around the Eye Opening
- Oribicularis Oculi
musculus orbicularis oculi
○ Orbital Part
§ Origin/Insertion:
Medial Palpebral Ligament
○ Palpebral Part
§ Origin: Medial Palpebral Ligament
§ Insertion: Lateral Palpebral Ligament
○ Lacrimal Part
§ Origin: Lacrimal Bone
§ Insertion: Lacrimal Sac
- Procerus
musculus procerus
○ Origin: Bridge of nose
○ Insertion: Skin of forehead
- Corrugator Supercilii
musculus corrugator supercilii
○ Origin: Glabella, Supraorbital margin
○ Insertion: Skin of Eyebrow
Muscles around the oral opening
- Sides ‘’Smile’’
- Zygogmaticus Major
musculus zygomaticus major
§ Origin: Zygomatic Bone
- Zygogmaticus Minor
musculus zygomaticus minor
§ Origin: Zygomatic Bone
- Risorius
musculus risorius
§ Origin: Masseteric Fascia
§ Insertion: Skin at the angle of the mouth
- Angle of the mouth
- Levator Anguli Oris
musculus levator anguli oris
§ Origin: Anterior Surface of Maxilla
§ Insertion: Skin at the angle of the mouth
- Levator Labi Superioris
musculus levator labi superiores
§ Origin: Infraorbital Margin of the maxilla
§ Insertion: Skin of the upper Lip
- Depresses the angle of the mouth
- Depressor Anguli Oris
musculus depressor anguli oris
- Depressor Labii Inferioris
Musculus depressor labii inferiores
- Lateral wall of Oral Cavity ‘’Satisfaction’’
- Buccinator Muscle
Musculus buccinator
§ Origin:
- Alveolar Processes of Maxilla and Mandibula
- Pterygomandibular Raphe
§ Insertion:
- Skin at the angle of the mouth
- Lips ‘’Kissing Muscle’’
- Orbicularis Oris
Musculus orbicularis oris
§ Marginal Part
§ Labial Part
- Chin ‘’Muscle of doubt’’
- Mentalis
Musculus mentalis
§ Origin:
- Alveolar Processes of Mandibula
§ Insertion:
- Skin of the chin
Muscles of the Nasal Opening
- Nasalis
Musculus nasalis
- Transverse Part
§ Origin: Anterior Surface of Maxilla
§ Insertion: Dorsal cartilage of the nose
- Alar Part
§ Origin: Anterior Surface of Maxilla
§ Insertion: Dorsal cartilage of the nose
- Levator labii superioris alaque nasi
Musculus levator labii superioris alaque nasi
- Origin: Frontal Process of Maxilla
- Insertion:
- Skin of the upper lip
- Skin of the nasal wing
Muscles around the Ear Opening
- Extrinsic muscles of the ear
- Auricularis Anterior
Musculus auricularis anterior
- Origin: Temporal Fascia
- Insertion: Auricle
- Auricularis Superior
Musculus auricularis superior
- Origin: Epicranial Aponeurosis
- Insertion: Auricle
- Auricularis Posterior
Musculus auricularis posterior
- Origin: Temporal Bone
- Insertion: Auricle