Muscles of the Neck and Head PDF

Muscles of the Neck and Head Posterior Neck “Bandage” muscles A: Extension/ hyperextensi...

Muscles of the Neck and Head Posterior Neck “Bandage” muscles A: Extension/ hyperextension of neck N: Cervical spinal NN Splenius capitis M: C1 O: Ligamentum nuchum, C2 Spinous process of C7–T3 I: Mastoid process, Superior C3 nuchal line C4 Splenius cervicis M C5 O: Spinous process of T3–T6 C6 I: Transverse process of C1–C3 C7 Suboccipital Triangle Muscles of the Tongue Extrinsic Muscles – External to Intrinsic Muscles – Internal to Movement at atlanto-occipital tongue! tongue! and atlantoaxial joints A: Extension and rotation of head/neck Rectus capitis posterior minor M O: Posterior tubercle of atlas C1 I: Occipital C2 Oblique capitis superior M C3 O: Transverse process of atlas C4 I: Occipital Rectus capitis posterior major M C5 O: Bifid spine of axis C6 I: Occipital Oblique capitis inferior M C7 O: Bifid spine of axis I: Transverse process of atlas  Extrinsic Muscles of the Tongue Pharyngeal Constrictor MM N: Hypoglossal Nerve A: Constricts pharynx during swallowing O: Styloid process Superior pharyngeal constrictor M Styloglossus M A: Retraction and O: Mandible and elevation of tongue pterygoid plate Genioglossus M Buccinator M A: Protraction of Middle pharyngeal A: Compresses tongue Stylohyoid M constrictor M cheek A: Retraction of hyoid O: Hyoid and elevation of the tongue Inferior pharyngeal Hyoglossus M Stylopharyngeus M constrictor M A: Depression of N: Glossopharyngeal N O: Laryngeal cartilage tongue Mastication Mastication A: Closes jaw by elevation of mandible Temporalis M I: Coronoid process O: Medial/lateral pterygoid plates of sphenoid Masseter M A: Elevate, draw mandible medially O: Zygomatic arch I: Angle of mandible  Facial MM I: Skin N: Facial Nerve Corrugator Occipitofrontalis M supercilii M Epicranial aponeurosis Frontal belly Procerus M Occipital belly Facial muscles are Orbicularis occuli M Nasalis M responsible for facial Zygomaticus expressions Levator labii alaeque major M nasi superioris M Zygomaticus minor M Levator labii superioris M Facial MM I: Skin N: Facial Nerve Bell’s Palsy Orbicularis oris M Paralysis of facial MM Typically affects only one side Risorius M Buccinator M Depressor anguli oris M Mentalis M Depressor labii inferioris M Platysma M  Extrinsic Muscles of the Eye Extrinsic Muscles of the Eye Levator palpebrae superioris M A: Elevate eyelid Medial view Trochlea Lateral view Superior oblique M I: Superior, lateral eyeball Superior rectus M N: Trochlear N I: Superior eyeball N: Oculomotor N Lateral rectus M I: Lateral eyeball Medial rectus M N: Abducens N I: Medial eyeball N: Oculomotor N Inferior oblique M I: Inferior, lateral eyeball N: Oculomotor N Inferior rectus M I: Inferior eyeball N: Oculomotor N