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32 terms

Anatomy: Head and Neck Muscle Innervations + Function

Muscles of the Head and Neck and their corresponding innervation/ function.
STUDY
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Epicranius (Occipitofrontalis)
Innervation: Facial Nerve (CN VII)
Function: Produce wrinkles in forehead. Astonishment
Temporoparietalis
Innervation: Facial Nerve (CN VII)
Orbicularis Oculi
Innervation: Facial Nerve (CN VII)
Function: Worry, Concern
Corrugator Supercilli
Innervation: Facial Nerve (CN VII)
Function: Thinkers Brow
Orbicularis Oris
Innervation: Facial Nerve (CN VII)
Function: Sucking shape of mouth. Reserve
Buccinator
Innervation: Facial Nerve (CN VII)
Function: Allows air to be blown out. Satisfaction.
Zygomaticus Major
Innervation: Facial Nerve (CN VII)
Function: Lifts corner of mouth up. Laughter, pleasure.
Zygomaticus Minor
Innervation: Facial Nerve (CN VII)
Function: Lifts corner of mouth up. Laughter, pleasure.
Risorius
Innervation: Facial Nerve (CN VII)
Function: Nasolabial Folds. Action.
Levator Labii Superioris
Innervation: Facial Nerve (CN VII)
Function: ?
Levator Anguli Oris
Innervation: Facial Nerve (CN VII)
Function: Self Confidence
Depressor Anguli Oris
Innervation: Facial Nerve (CN VII)
Function: Sadness
Depressor Labii Inferioris
Innervation: Facial Nerve (CN VII)
Function: Perseverance
Mentalis
Innervation: Facial Nerve (CN VII)
Function: Doubt, indecision.
Platysma
Innervation: Facial Nerve (CN VII)
Function: Sadness
Masseter
Innervation: Masseteric Nerve (CN V/3)
Function: Powerfully closes jaw.
Temporalis
Innervation: Deep Temporal Nerve (CN V/3)
Function: Strongest elevator of lower jaw.
Lateral Pterygoid
Innervation: Lateral Pterygoid N (CN V/3)
Function: Mandibular movement.
Medial Pterygoid
Innervation: Medial Pterygoid N (CN V/3)
Function: Elevate Mandible
Trapezius
Innervation: Accessory Nerve (CN XI). C3-C4 (propioception + pain).
Function: Lifts shoulders
Sternocleidomastoid
Innervation: Accessory Nerve (CN XI). C3-C4 (propioception + pain)
Function:
Omohyoid
Innervation: Cervical Ansa C1-C3
Function: Fascia tensor. Dilates internal jugular vein.
Sternohyoid
Innervation: Cervical Ansa C1-C3
Function: Stabilize laryngeal cartilage.
Sternothyroid
Innervation: Cervical Ansa C1-C3
Function: Stabilize laryngeal cartilage.
Thyrohyoid
Innervation: Cervical Ansa C1-C3
Function: Stabilize laryngeal cartilage.
Digastric
Innervation: Anterior Belly: Nerve to Myelohyoid (CN V/3). Posterior Belly: Facial Nerve (CN VII).
Function: Stabilize hyoid in speaking + swallowing.
Stylohyoid
Innervation: Facial Nerve CN VII
Function: Elevate and retract hyoid.
Myelohyoid
Innervation: Myelohyoid Nerve CN V/3
Function: Elevates Hyoid, floor of mouth, and tongue during swallowing and speaking.
Geniohyoid
Innervation: C1 via Hypoglossal Nerve
Function: Pulls hyoid anteroposteriorly.
Rectus Capitis
Innervation: Cervical Plexus C1
Function: Flexes head.
Longus Capitis
Innervation: Cervical Plexus C1-C4
Function: Turns head sideways. Bends head forward.
Longus Colli
Innervation: Cervical + Brachial Plexus C1-C8
Function: Bend cervical spine forward.