Muscles of body with Actions, Innervation and Blood Supply

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1. SCALP, FACE, AND TEMPORAL REGION
1.1 MUSCLES OF FACIAL EXPRESSION (LIES IN THE SUBCUTANEOUS TISSUE) [2nd pharyngeal arch]
[Facial nerve (CN VII)]
Muscle Origin Insertion Main Action
Forehead Muscle
1 Frontal belly of Epicranial Skin of i) Elevates eyebrows & skin of
occipitofrontalis aponeurosis forehead and forehead (surprise, frowning)
(no bony attachments) eyebrows ii) Horizontally wrinkles skin of
forehead
Auricle Muscles
1 Auricularis anterior
2 Auricularis superior
3 Auricularis posterior
Muscles around mouth, lips, and cheeks
1 Orbicularis oris Sphincter of the mouth
(Orbital sphincter) (whistling, speech, pursing the
mouth)
2 Levator labii superioris i) Elevates upper lip
alaeque nasi ii) Elevates alar cartilage of
the nose
3 Levator labii superioris i) Retract/Elevates
4 Zygomaticus minor upper lip (contempt)
ii) Deepen nasolabial
sulcus (sadness)
5 Zygomaticus major Draws the angle of the mouth
6 Levator anguli oris superolaterally (smiling,
laughing)
7 Depressor anguli oris Draws the angle of the mouth
inferolateally (frowning, grief)
8 Depressor labii inferioris Draws the lip inferiorly and
slightly laterally (impatience)
9 Mentalis Elevates and protrudes lower lip
(doubt)
10 Buccinator Presses cheek against molar
(cheek muscle) teeth (chewing, blowing,
whistling)
11 Risorius Draws the corner of the mouth
laterally (grinning)
Eyelids Muscles
Lacrimal Draws the eyelids and lacrimal
part puncta (lacrimal openings)
medially
1 Orbicularis Palpebral Gently closes the eyelid
oculi part (blinking)
Orbital part Tightly closes the eyelid
(squinting)
i) Draws the medial end of
2 Corrugator supercilli the eyebrow downward
ii) Wrinkles the forehead
vertically (concern)


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Nose Muscles
Compressor Compresses the nostrils
naris
1 Nasalis (transverse
part)
Dilator naris i) Widens the anterior
(alar part) nasal
aperture
ii) Flaring the nostrils
2 Procerus Draws the medial part of
(continuous with the the eyebrow medially
frontalis muscle) (transverse wrinkles over
the bridge of the nose)
3 Depressor septi Assists the dilator naris to
widen the nostrils during
deep inspiration
Neck Muscle
1 Platysma i) Superficial fascia i) Mandible Depressor mandible and
of deltoid ii) Skin of cheek tenses skin of lower face
ii) Pectoral regions iii) Angle of and neck
mouth
iv) Obicularis oris
FACIAL EXPRESSION – SCALP - Epicranius Muscle
1 Occipitofrontalis Frontal Epicranial Skin of forehead i) Elevates eyebrows &
belly aponeurosis and eyebrows skin
of forehead
(surprise, frowning)
ii) Horizontally wrinkles
skin
of forehead
Occipital i) Superior Epicranial Moves scalp backward
belly nuchal line aponeurosis
ii) Mastoid
bone




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1. SCALP, FACE, AND TEMPORAL REGION (INNERVATION AND BLOOD SUPPLY)
1.2 Innervation and blood supply of Facial Expression Muscles

Muscle Innervation Blood Supply
Forehead Muscle
1 Frontal belly of Temporal branch of FN Frontal branch of superficial temporal
occipitofrontalis artery
(no bony attachments)
Auricle Muscles
1 Auricularis anterior
2 Auricularis superior
3 Auricularis posterior
Muscles around mouth, lips, and cheeks
1 Orbicularis oris i) Zygomatic branch of FN i) Inferior labial artery of FA
(Orbital sphincter) ii) Buccal branch of FN ii) Superior labial artery of FA
iii) Mandibular branch of FN
(CN V3)
2 Levator labii superioris i) Zygomatic branch of FN i) Superior labial artery of FA
alaeque nasi ii) Buccal branch of FN ii) Angular branch of FA
3 Levator labii superioris
4 Zygomaticus minor Superior labial artery of FA
5 Zygomaticus major
6 Levator anguli oris
7 Depressor anguli oris i) Mandibular nerve of Inferior labial artery of FA
8 Depressor labii inferioris FN (CN V3)
ii) Buccal branch of FN

9 Mentalis Marginal mandibular branch
of FN (CN V3)
10 Buccinator Buccal branch of FN i) Muscular branches of FA
(cheek muscle) ii) Buccal branch of maxillary artery
11 Risorius i) Zygomatic branch of FN Superior labial artery of FA
ii) Buccal branch of FN
Eyelids Muscles
1 Orbicularis Lacrimal Facial nerve, FN (CN VII) i) Facial artery, FA
oculi part ii) Superficial temporal artery
Palpebral
part
Orbital
part
2 i) Zygomatic branch of FN i)Zygomatic branch of superficial
Corrugator supercilli ii) Temporal branch of FN temporal artery
ii) Anterior branch of superficial
temporal artery
Nose Muscles
Compressor naris i) Zygomatic branch of FN i) Superior labial branch of FA
1 Nasalis (transverse part) ii) Buccal branch of FN ii) Septal branch of FA
Dilator naris iii) Lateral nasal branch of FA
(alar part)
2 Procerus i) Zygomatic branch of FN i) Angular branch of FA

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