UB PAS 407 EXAM 3 QUESTIONS WITH COMPLETE
SOLUTIONS
Anterior scalene Correct Answers Function: Elevation of rib 1,
Lateral flexion of neck, Rotation of neck
Innervation: Ventral rami of C4-6 spinal nerves
Arytenoid Correct Answers Function: Adducts vocal folds
(cords) by approximating arytenoid cartilages
Innervation: Recurrent laryngeal nerve
Buccinator Correct Answers Function: Compression of cheek
(e.g., inflating a balloon; playing a wind musical instrument)
Innervation: Facial nerve (CN 7)
Cricothyroid Correct Answers Function: Tenses and elongates
vocal ligaments by "tilting" cricoid cartilage on thyroid cartilage
Innervation: External laryngeal branch of superior laryngeal
nerve
Dartos muscle Correct Answers Function: regulate the
temperature of the testicles,
Innervation: genitofemoral nerve
Diaphram Correct Answers Function: Dome of diaphragm
flattens during inspiration
,Contraction increases vertical dimension of thoracic cavity
Innervation: phrenic nerve
Digastric Correct Answers Function: Depression of mandible
(opens mouth), Elevation of hyoid bone
, Innervation: Anterior belly: Trigeminal nerve (CN 5 (3)),
Posterior belly: Facial nerve (CN 7)
External intercostals Correct Answers Function: Elevation of
ribs during inhalation
Innervation: Intercostal nerves
External oblique Correct Answers Function: Unilateral: rotation
of trunk
Bilateral: flexion of trunk (sit-ups)
Compression of anterior abdominal wall and viscera (increases
intra-abdominal pressure)
Innervation: thoracoabdominal nerves
Genioglossus Correct Answers Function: Protraction of tongue
("sticking tongue out")
Innervation: Hypoglossal nerve (CN 11)
Geniohyoid Correct Answers Function: Elevation of hyoid bone
Innervation: C1 spinal nerve (ventral ramus)
Hypoglossus Correct Answers Function: depresses and retracts
the tongue
Innervation: Hypoglossal nerve (CN 11)
iliacus Correct Answers Function: Flexion of thigh
Innervation: Femoral nerve
inferior oblique Correct Answers Function: Elevation of eyeball
(e.g., looking upward), Lateral rotation of eyeball (e.g., looking
outward)
SOLUTIONS
Anterior scalene Correct Answers Function: Elevation of rib 1,
Lateral flexion of neck, Rotation of neck
Innervation: Ventral rami of C4-6 spinal nerves
Arytenoid Correct Answers Function: Adducts vocal folds
(cords) by approximating arytenoid cartilages
Innervation: Recurrent laryngeal nerve
Buccinator Correct Answers Function: Compression of cheek
(e.g., inflating a balloon; playing a wind musical instrument)
Innervation: Facial nerve (CN 7)
Cricothyroid Correct Answers Function: Tenses and elongates
vocal ligaments by "tilting" cricoid cartilage on thyroid cartilage
Innervation: External laryngeal branch of superior laryngeal
nerve
Dartos muscle Correct Answers Function: regulate the
temperature of the testicles,
Innervation: genitofemoral nerve
Diaphram Correct Answers Function: Dome of diaphragm
flattens during inspiration
,Contraction increases vertical dimension of thoracic cavity
Innervation: phrenic nerve
Digastric Correct Answers Function: Depression of mandible
(opens mouth), Elevation of hyoid bone
, Innervation: Anterior belly: Trigeminal nerve (CN 5 (3)),
Posterior belly: Facial nerve (CN 7)
External intercostals Correct Answers Function: Elevation of
ribs during inhalation
Innervation: Intercostal nerves
External oblique Correct Answers Function: Unilateral: rotation
of trunk
Bilateral: flexion of trunk (sit-ups)
Compression of anterior abdominal wall and viscera (increases
intra-abdominal pressure)
Innervation: thoracoabdominal nerves
Genioglossus Correct Answers Function: Protraction of tongue
("sticking tongue out")
Innervation: Hypoglossal nerve (CN 11)
Geniohyoid Correct Answers Function: Elevation of hyoid bone
Innervation: C1 spinal nerve (ventral ramus)
Hypoglossus Correct Answers Function: depresses and retracts
the tongue
Innervation: Hypoglossal nerve (CN 11)
iliacus Correct Answers Function: Flexion of thigh
Innervation: Femoral nerve
inferior oblique Correct Answers Function: Elevation of eyeball
(e.g., looking upward), Lateral rotation of eyeball (e.g., looking
outward)
