Neck and face Flashcards
Occipitofrontalis
Origin: Superior nuchal line of occipital bone
Insertion: skin of eyebrows and root of nose
N: facial nerve
A: Raise eyebrows and wrinkles forehead
Buccinator
O: Alveolar processes of maxilla and mandible
I: Angle of mouth
A: compresses cheek
N: facial nerve
Obicularis Oris
O: Vermilion line
I: Skin and fascia of lips
A: compresses and protrudes lips
N: facial nerve
Temporalis
O: Temporal fossa
I: Coronoid process and ramus of mandible
A: Elevates and retracts mandible
N: Anterior and posterior deep temporal nerves
Masseter
O: Zygomatic arch
I: Ramus of mandible
A: elevates mandible and assists in protraction of mandible
N: Masseteric nerve
Medial Pterigoid
O:Medial surface of lateral pterygoid plate of sphenoid bone
I:Medial surface of ramus and angle of mandible
A: Laterally moves and protracts mandible
N: Nerve to medial Pterygoid muscle
Lateral Pterigoid
I: Lateral aspects of lateral Pterigoid plate of spenoid bone.
O: Neck of mandible
A: Laterally moves and protracts mandible
N: nerve to lateral Pterigoid muscle
Sternocleidomastoid
O: Anterior surface of manubrium of sternum, medial one third of clavicle
I: Mastoid process of temporal bone and superior nuchal line of occipital bone.
A: Flexes and laterally flexes neck, rotates head
N: Accessory nerve
Sternohyoid
I: Sternal end of clavicle and manubrium of sternum
O: Inferior border of hyoid bone
A: depresses hyoid bone
N: Ansa cervicalis
Scalenus anterior
O:Tubercles of transverse processes of C3-C6 vertebrae
I: Scalene tubercle of the first rib
A: Flexes rotates and laterally flexes neck, elevates first rib
N: Anterior rami of C4-C6
Scalenus medius
I: transverse processes of C2-C7 vertebrae.
O: superior surface of first rib
A: Laterally flexes neck; elevates first rib.
N: Anterior rami of third to eighth
cervical nerves (C3-C8).
Scalenus posterior
Origin: tubercles of transverse processes of C4-C6 vertebrae.
Insertion: External surface of second rib.
Action: Laterally flexes neck; elevates second rib.
Innervation: Anterior rami of fourth to sixth
cervical nerves (C4-C6).
Longus Capitis
Origin: Anterior tubercles of transverse
processes of C3-C6 vertebrae.
Insertion. Basilar part of occipital bone.
Action: Flexes head.
Innervation: Anterior rami of first to third
cervical nerves (C1-C3).
Longus Colli
Anterior aspects of C3-T3 vertebrae.
Insertion: Anterior aspects of C1-C6 vertebrae.
Action: Flexes and rotates neck at cervical
vertebral joints.
Innervation: Anterior rami of second to
sixth cervical nerves (C2-C6).
Rectus Capitis
Posterior Minor
Origin: Posterior arch of atlas (C1).
Insertion: Inferior nuchal line of occipital
bone and adjacent area.
Action: Extends head.
Innervation: Suboccipital nerve (posterior
ramus of first cervical nerve)
Rectus Capitis
Posterior Major
Origin: Spinous process of axis (C2).
Insertion: Inferior nuchal line of occipital bone.
Action: Rotates and extends head.
Innervation: Suboccipital nerve (posterior
ramus of first cervical nerve).
Obliquus
Capitis Inferior
Origin: Spinous process of axis (C2).
Insertion: Transverse process of atlas (C1).
Action: Rotates head.
Innervation: Suboccipital nerve (posterior
ramus of first cervical nerve).
Obliquus
Capitis
Superior
Origin: Transverse process of atlas (C1).
Insertion: Between superior and inferior nuchal lines of occipital bone.
Action: Laterally flexes and extends head.
Innervation: Suboccipital nerve (posterior
ramus of first cervical nerve).
Splenius Capitis
also has a Colli
Origin: Nuchal ligament and spinous processes of C7-T3 vertebrae. Insertion: Mastoid process of temporal bone; lateral one third of superior nuchal line of occipital bone. Action: Rotates and extends head. Innervation: Posterior rami of second and third cervical nerves.
Semispinalis Capitis
(also has a Colli and
Thoracis
Origin: Superior articular processes of C4 C7 vertebrae; transverse processes of T1 -T6 vertebrae. Insertion: Area located between superior inferior nuchal lines of occipital bone. Action: Extends and rotates the head. Innervation: Greater occipital (C2) and third cervical nerves
