Home
Browse
Create
Search
Log in
Sign up
Upgrade to remove ads
Only $2.99/month
Final Exam Muscles
STUDY
Flashcards
Learn
Write
Spell
Test
PLAY
Match
Gravity
Terms in this set (38)
Orbicularis Oris
In: facial nerve (CN VII) via buccal branch
A: phasic contraction compresses and protrudes lips (kissing) or resists distension (blowing)
Depressor Anguli Oris
In: facial nerve (CN VII) via mandibular branch
A: part of dilators of mouth; depresses labial commissure bilaterally to frown (sadness)
Levator Labii Superioris
In: facial nerve (CN VII) via buccal branch
A: elevate and/or evert upper lip; deepen nasolabial sulcus (showing sadness)
Levator Anguli Oris
In: facial nerve (CN VII) via buccal branch
A: part of dilators of mouth, elevate labial commissure (bilaterally to smile, unilaterally to sneer)
Buccinator
In: facial nerve (CN VII) via buccal branch
A: presses cheek against molar teeth; works with tongue to keep food between occlusal surfaces and out of oral vestibule; resists distension (when blowing)
Orbicularis Oculi
In: facial nerve (CN VII) via temporal and zygomatic branches
A: closes eyelids; palpebral part does so gently; orbital part does so tightly (winking)
Platysma
In: cervical branch of facial nerve (CN VII)
A: draws the corner of mouth inferiorly and widens it (sadness and fright); draws skin of neck superiorly when teeth are clenched
Sternohyoid
In: C1-C3 by a branch of ansa cervicalis
A: depresses hyoid after elevation during swallowing
Omohyoid
In: C1-C3 by a branch of ansa cervicalis
A: depresses, retracts, and steadies the hyoid
Sternothyroid
In: C2 and C3 by a branch of ansa cervicalis
A: depress hyoid and larynx
Thyrohyoid
In: C1 via hypoglossal nerve (CN XII)
A: depresses hyoid, elevates larynx
Anterior Digastric
In: nerve to mylohyoid, a branch of inferior alveolar nerve
A: working with infrahyoid muscles: depresses mandible against resistance, elevates and steadies hyoid during swallowing and speaking
Posterior Digastric
In: digastric branch of facial nerve (CN VII)
A: working with infrahyoid muscles: depresses mandible against resistance, elevates and steadies hyoid during swallowing and speaking
Mylohyoid
In: nerve to mylohyoid, a branch of inferior alveolar nerve (from mandibular nerve, CN V3)
A: elevates hyoid, floor of mouth, and tongue during swallowing and speaking
Stylohyoid
In: stylohyoid branch of facial nerve (CN VII)
A: elevates and retracts hyoid, thus elongating floor of mouth
Sternocleidomastoid
O: mastoid process of temporal bone, lateral half of superior nuchal line
I: sternal head: manubrium of sternum; clavicular head: medial third of clavicle
In: spinal accessory nerve (CN XI, motor); C2 and C3 nerves (pain and proprioception)
A: unilaterally: ipsilat laterally bends and contralat rotates head and neck; bilaterally: protrudes head and neck; elevates sternum during forceful inspiration
Anterior Scalene
O: transverse processes of C3-C6 vertebrae
I: 1st rib
In: ventral rami C4-C6 spinal nerves
A: laterally flex head and neck to same side; elevate first rib during forced inspiration
Middle Scalene
O: transverse processes of C3-C6 vertebrae
I: 1st rib
In: ventral rami C3-C8 spinal nerves
A: laterally flex head and neck to same side; elevate first rib during forced inspiration
Posterior Scalene
O: posterior tubercles of transverse processes of C2-C7 vertebrae
I: external border of 2nd rib
In: ventral rami C7-C8 spinal nerves
A: laterally flex head and neck; elevate 2nd rib during forced inspiration
Rectus Capitis Anterior
In: branches from the loop between C1 and C2 spinal nerves
A; flex head
Rectus Capitis Lateralis
In: branches from the loop between C1 and C2 spinal nerves
A: flex head and help stabilize it
Longus Colli
In: ventral rami of C2-C6 spinal nerves
A: flexes neck acting bilaterally; contralateral rotation acting unilaterally
Longus Capitis
In: ventral rami of C1-C3 spinal nerves
A: flex head
Masseter
In: anterior trunk of mandibular nerve (CN V3) via masseteric nerve
A: elevates mandible thus closing the jaw; superficial fibers make a limited contribution to protrusion of mandible
Temporalis
In: anterior trunk of mandibular nerve (CN V3) via deep temporal branches
A: elevates mandible thus closing the jaw; horizontal (posterior) fibers are primary retractors of mandible
Medial Pterygoid
In: anterior trunk of mandibular nerve (CN V3) via medial pterygoid nerve
A: acts synergistically with masseter to elevate mandible; contributes to protrusion; alternate unilateral activity produces smaller grinding movements
Lateral Pterygoid
In: anterior trunk of mandibular nerve (CN V3) via lateral pterygoid nerve
A: acting bilaterally, protracts mandible and depresses chin; acting unilaterally, swings jaw towards contralateral side, alternate unilateral contraction produces larger lateral shewing movements
External Intercostal
In: intercostal nerve
A: elevate ribs during forced inspiration
Internal Intercostal
In: intercostal nerve
A: interosseous part, depress ribs during forced respiration; interchondral part, elevate ribs during forced respiration
Innermost Intercostal
In: intercostal nerve
A: interosseous part, depress ribs during forced respiration; interchondral part, elevate ribs during forced respiration
Transversus Thoracis
In: intercostal nerve
A: weakly depresses ribs
External Oblique
O: external surface of the 5th-12th ribs
I: linea alba, pubis tubercle, anterior half of the iliac crest
In: thoracoabdominal nerves (T7-T11 spinal nerves), subcostal nerve
A: bilaterally, flexes trunk; unilaterally, rotates trunk contralaterally; compresses abdominal viscera
Internal Oblique
O: thoracolumbar fascia, anterior two thirds of the iliac crest, lateral two thirds of the inguinal ligament
I: inferior borders of the 10-12th ribs, linea alba, pecten pubis via the conjoint tendon
In: thoracoabdominal nerves (ventral rami of T6-T2 spinal nerves); first lumbar nerves
A: bilaterally, flexes trunk; unilaterally, rotates trunk ipsilaterally; compresses abdominal viscera
Transversus Abdominis
O: internal surfaces of 7th-12th costal cartilages, thoracolumbar fascia, iliac crest, lateral third of the inguinal ligament
I: linea alba with the aponeurosis of the internal oblique, pubic crest, pecten pubis via the conjoint tendon
In: thoracoabdominal nerves (ventral rami of T6-T12 spinal nerves), first lumbar nerves
A: compresses and supports abdominal viscera
Rectus Abdominis
O: pubic symphysis, pubic crest
I: xiphoid process, 5th-7th costal cartilages
In: thoracoabdominal nerves (ventral rami of T6-T12 spinal nerves)
A: flexes trunk (lumbar vertebrae) and compresses abdominal viscera; stabilizes and posteriorly tilts pelvis
Quadratus Lumborum
O: medial half of the inferior border of the 12th rib, tips of the lumbar transverse processes
I: iliolumbar ligament, internal lip of the iliac crest
In: ventral rami of T12-L4 nerves
A: extends and laterally flexes vertebral column; fixes 12th ribs during inspiration
Coccygeus (Ischiococcygeus)
In: branches of S4 and S5 spinal nerves
A: forms small part of pelvic diaphragm that supports pelvic viscera; flexes coccyx
Levator Ani (Puborectalis, Pubococcygeus, and Iliococcygeus)
In: nerve to levator ani (branches of S4); inferior anal (rectal) nerve; coccygeal plexus
A: forms most of pelvic diaphragm that helps support pelvic viscera and resists increases in intra-abdominal pressure
THIS SET IS OFTEN IN FOLDERS WITH...
Muscles of Face
24 terms
Muscles of Posterior Shoulder and Arm- Origin
8 terms
Muscles of Anterior Neck
52 terms
Muscles of Posterior Shoulder and Arm- Insertion
8 terms
YOU MIGHT ALSO LIKE...
Final exam info
36 terms
Thorax, Abdomen, Pelvis
53 terms
Posterior Muscles
49 terms
anterior muscles OIAs
30 terms
OTHER SETS BY THIS CREATOR
Lab 17-21 Functions
40 terms
Knee Joint
71 terms
Hip Joint
76 terms
Lower Extremity Muscle Length Testing
11 terms