BIOD 151 FINAL PAPER UPDATED
COMPLETE QUESTIONS AND CORRECT
ANSWERS BUNDLED REVIEW GUIDE
●● Orbicularis oris
Answer: Action: mouth closure: closes lips, protrudes lips forward,
presses lips against teeth
Innervation: facial nerve (CN VII)
●● Zygomaticus major/minor
Answer: Action: pull corners of lips upward
Innervation: facial nerve (CN VII)
●● Risorius
Answer: Action: pulls the corners of the mouth posteriorly (grin or
grimace)
Innervation: facial nerve (CN VII)
●● Frontalis (occipitofrontailis)
,Answer: Action: raise eyebrows
Innervation: facial nerve (CN VII)
●● Buccinator
Answer: Action: compress cheeks
Innervation: facial nerve (CN VII)
●● Masseter
Answer: Action: jaw closure
Innervation: trigeminal nerve (CN V, mandibular branch)
●● Temporalis
Answer: Action: Elevates mandible, closes jaw
Innervation: trigeminal nerve (CN V, mandibular branch)
●● lateral flexion
Answer: Side-bending left or right
●● neck flexion
,Answer: chin to chest
●● bilateral
Answer: both sides
●● unilateral
Answer: one-sided
●● Semispinalis Capitis
Answer: Origin: articular processes of inferior cervical & transverse
process of superior thoracic vertebrae
Insertion: occipital bone
Action: Bilateral extend head Unilateral laterally flexes neck to same
side
Innervation: spinal nerves
●● Sternocleidomastoid
Answer: Origin: sternal end of clavicle and manubrium
Insertion: mastoid region of skull
, Action:Bilateral: neck flexionUnilateral: turns face to opposite side
Innervation: accessory nerve (CN XI)
●● Splenius Capitis
Answer: Origin: spinous process AND ligaments of inferior cervical
vertebrae
Insertion: mastoid process, occipital bone of skull
Action:Bilateral extend headUnilateral laterally flexes neck to same side
Innervation: cervical spinal nerves
●● Longissimus cervicis
Answer: Origin: transverse processes of superior thoracic vertebrae
Insertion: transverse process of middle and superior cervical vertebrae
Action:Bilateral extend headUnilateral laterally flexes neck to same side
COMPLETE QUESTIONS AND CORRECT
ANSWERS BUNDLED REVIEW GUIDE
●● Orbicularis oris
Answer: Action: mouth closure: closes lips, protrudes lips forward,
presses lips against teeth
Innervation: facial nerve (CN VII)
●● Zygomaticus major/minor
Answer: Action: pull corners of lips upward
Innervation: facial nerve (CN VII)
●● Risorius
Answer: Action: pulls the corners of the mouth posteriorly (grin or
grimace)
Innervation: facial nerve (CN VII)
●● Frontalis (occipitofrontailis)
,Answer: Action: raise eyebrows
Innervation: facial nerve (CN VII)
●● Buccinator
Answer: Action: compress cheeks
Innervation: facial nerve (CN VII)
●● Masseter
Answer: Action: jaw closure
Innervation: trigeminal nerve (CN V, mandibular branch)
●● Temporalis
Answer: Action: Elevates mandible, closes jaw
Innervation: trigeminal nerve (CN V, mandibular branch)
●● lateral flexion
Answer: Side-bending left or right
●● neck flexion
,Answer: chin to chest
●● bilateral
Answer: both sides
●● unilateral
Answer: one-sided
●● Semispinalis Capitis
Answer: Origin: articular processes of inferior cervical & transverse
process of superior thoracic vertebrae
Insertion: occipital bone
Action: Bilateral extend head Unilateral laterally flexes neck to same
side
Innervation: spinal nerves
●● Sternocleidomastoid
Answer: Origin: sternal end of clavicle and manubrium
Insertion: mastoid region of skull
, Action:Bilateral: neck flexionUnilateral: turns face to opposite side
Innervation: accessory nerve (CN XI)
●● Splenius Capitis
Answer: Origin: spinous process AND ligaments of inferior cervical
vertebrae
Insertion: mastoid process, occipital bone of skull
Action:Bilateral extend headUnilateral laterally flexes neck to same side
Innervation: cervical spinal nerves
●● Longissimus cervicis
Answer: Origin: transverse processes of superior thoracic vertebrae
Insertion: transverse process of middle and superior cervical vertebrae
Action:Bilateral extend headUnilateral laterally flexes neck to same side
