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Muscles
quiz 3
60
Anatomy
Undergraduate 3
02/19/2007

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Term
orbicularis oculi
Definition
origin: frontal and maxilla; Insertion: encircles eye; Action: closes eyelids (sphincter of eyelids); Innervation: CN7 facial
Term
orbicularis oris
Definition
O: superficial tissue around mouth; Insertion: encircles Lip; Action: Sphincter of mouth (closes lips); Innervation: CN7 facial
Term
skeletal muscle has _______
Definition
Innervation to every cell
Term
Origin of muscles
Definition
Immovable or less moveable attachment
Term
Insertion of muscles
Definition
more movable attachment
Term
platysma
Definition
O: fascia of pectoral and deltoid regions; Insert: mandible and skin of lower face; Act: depresses mandible and angle of mouth; Innervation: CN7
Term
zygomaticus major
Definition
O:zygomatic; INS:corner of mouth; ACT:raises angle of mouth; INNERVAT: CN7
Term
depressor anguli oris
Definition
O:mandible; INS: corner of mouth; ACT: depresses corner of mouth; INN: CN7
Term
mentalis
Definition
O:mandible; INS: skin of the chin; ACT:protrudes lower lip and wrinkles chin; INNERVATION: CN7
Term
frontalis
Definition
O:superficial tissue of forehead; INS:skin of forehead above eyebrows; ACT:raises eyebrow and wrinkles forehead; INNER:CN7
Term
masseter (muscles of mastication)
Definition
O: zygomatic, temporal; INS:mandible; ACT:elevates mandible (closes jaw); INNERVA: CN5 (trigeminal)
Term
Temporalis (muscles of Mastication)
Definition
O:frontal, parietal; INS:mandible; ACT:elevates and retracts mandible (closes jaw); INNERV:CN5 (trigeminal)
Term
genioglossus (extrinsic muscle of the tongue)
Definition
O:mandible; INS:tip and base of tongue, hyoid; ACT:retracts and protrudes tongue; INNERVATION: CN12 (hypoglossal)
Term
Muscles of the neck
STERNOCLEIDOMASTOID
Definition
O:manubrium of sternum, clavicle; INSERT:mastoid process of temporal bone; ACT:unilateral contraction turns the head to the opposite side; INNERV: CN11 (accessory)
Term
Sternohyoid
(infrahyoid muscles)
Muscles of the neck
Definition
O: manubrium of sternum; INS:hyoid bone; ACT:depresses larynx and hyoid during phonation & swallowing; INNERV:ansa cervicalis
Term
STERNOTHYROID
infrahyoid muscles
muscles of the neck
Definition
O:manibrium of the sternum; INS:thyroid cartilage; ACT:depress larynx during phonation and swallowing; INNERV:ansa cervicalis
Term
EXTERNAL INTERCOSTAL
same as INTERNAL INTERCOSTAL:
muscles if the Thorax and Abdomen
Definition
O:RIB; INS:RIB; ACT:aids in respiration; INNERV:intercostal nerves
Term
DIAPHRAGM
muscles of the thorax and abdomen
Definition
O:inferior border of the rib cage and sternum, lumbar vert. 1-3; INSERTION: central tendon; ACTION:prime mover of respiration; INERV:phernic nerve
Term
EXTERNAL ABDOMINAL OBLIQUE
muscles of the Thorax and Abdomen
Definition
O: ribs 5-12; INSER:linea alba via rectus sheath; ACTION:compresses abdominal contents, rotate trunk; INNERV:intercostal nerves
Term
internal abdominal oblique: muscles of the thorax and abdomen
Definition
O:lumbodorsal fascia, ilium, inguinal ligament; INSERT:linea alba via rectus sheath, ribs 10-12; ACTION:compresses abdominal contents, rotate trunk; INNERV:intercostal nerves
Term
transversus abdominis
Definition
O:ribs 5-12, inguinal ligament,ilium, lumbodorsal fascia; INS:linea alba via rectus sheath, ribs 5-7; ACTION:compresses abdominal contents, rotate trunk; INNERV:intercostal nerves
Term
rectus abdominus
Definition
O:Pubis; INS:xiphoid and costal cartilages of ribs 5-7; ACT:compresses abdominal contents and flexes trunk; INNERV:intercostal nerves
Term
ERECTOR SPINAE
(true back muscles)
iliocostalis
longissimus
spinalis
Definition
O:ilium & sacrum; INS:vertebrae, ribs, spine and skull; ACT:BILATERAL... extends the trunk, neck, & head, UNILATERAL... laterally flexes trunk, neck & head; INNERV: dorsal rami
Term
splenius capitis
(true back muscles)
Definition
O:cervical vertebrae; INS:occipital bone; ACTION:bilateral: extend head unilateral: extend & laterally rotate head; INERV:dorsal rami
Term
Shoulder muscles:deltoid
Definition
O:scapula, clavicle; INS:humerus; ACT:flexes & extends arm, strongly abducts arm; INNERV: axilary nerve
Term
Shoulder muscles: trapezius
Definition
O:occipital bone, nuchal ligament, vertebrae C7 T12; INS:scapula, clavicle; ACT:stabilizes, retracts, elevates & depresses scapula; INNERV:CN11 (accessory)
Term
latissimus dorsi
Definition
O:ilium, vertebrae T6-L5; INS:humerus; ACT:extends & adducts arm; INNERV:brachial plexus
Term
teres major
Definition
O:scapula; INS:humerus; ACTION: medially rotate & adduct arm; INNERV:brachial plexus
Term
serratus anterior
Definition
O:upper 9 ribs on anterolateral chest wall; INS:scapula; ACT:protracts & holds scapula against posterior chest wall; INNERV:brachial plexus
Term
pectoralis major
Definition
O:clavicle, sternum, costal cartilage 1-6; INS:humerus; ACTION:medially rotates & adducts arm; INNERV:pectoral nerves
Term
supraspinatus
(rotator cuff muscles)
Definition
O:scapula; INS:humerus; ACT:stabilizes shoulder joint & weakly abducts arm; INERV:brachial plexus
Term
infraspinatus
(rotator cuff muscles)
Definition
O:scapula; INS:humerus; ACT:stabilizes shoulder joint & laterally rotates arm; INERV:brachial plexus
Term
teres minor
(rotator cuff muscles)
Definition
O:scapula; INS:humerus; ACT:stabilizes shoulder joint & laterally rotates arm; INERV:brachial plexus
Term
subscapularis
(rotator cuff muscles)
Definition
O:scapula; INS:humerus; ACT:stabilizes shoulder joint & MEDIALLY rotates arm; INERV:brachial plexus
Term
coracobrachialis
(Anterior (flexor) compartment)
ARM
Definition
O:scapula; INS:humerus; ACT:weakly flexes arm; INNERV:musculocutaneous n.
Term
biceps brachii
Definition
O:scapula; INS:radius; ACT:flexes arm, flexes & supinates forearm INNERV:musculocutaneous n.
Term
brachialis
Definition
O:humerus; INS:ulna; ACT:flexes forearm; INNERV:musculocutaneous n.
Term
triceps brachii
long head
Definition
O:scapula; INS:ulna; ACT:extends arm & forearm INNERV:radial nerve
Term
triceps brachii:
medial and lateral heads
Definition
O:humerus; INS:ulna; ACT: extends forearm INNERV:radial nerve
Term
anterior (flexor) compartment
(muscles of the forearm)
Definition
O:humerus, radius, and ulna; INS:carpals, metacarpals and phalanges; ACT:flexes wrist & fingers, pronates forearm; INNERV:median & ulnar nerves, median nerve
Term
posterior (extensor) compartment
(muscles of the forearm)
Definition
O:humerus, radius, and ulna; INS:carpals, metacarpals and phalanges; ACT:extend wrist & fingers, supinates forearm; INNERV:radial nerve
Term
Muscles of the hand: interossei
Definition
O:metacarpals; INS:proximal phalanx; ACT:abducts & adducts fingers; INNERV:ulnar nerve
Term
Muscles of the hand:
opponens pollicis
Definition
O:carpals; INS:1st metacarpal; ACT:opposition of thumb; INNERV:median nerve
Term
Muscles of the Lower Limb:
Muscles of the gluteal region:
gluteus maximus
Definition
O:ilium, sacrum; INS:femur and the IT tract (iliotibial tract); ACT:extands and laterally rotates thigh; INNERV: gluteal nerves
Term
Muscles of the Lower Limb:
Muscles of the gluteal region:
gluteus medius
Definition
O:ilium; INS:femur; ACT:abducts thigh; INNERV:gluteal nerves
Term
Muscles of the Lower Limb:
Muscles of the anterior thigh compartment:
quadriceps femoris:
RECTUS FEMORIS
Definition
O:ilium; INS:tibia via patellar ligament; ACT:extends leg, flexes thigh; INNERV:femoral nerve
Term
Muscles of the Lower Limb:
Muscles of the anterior thigh compartment:
quadriceps femoris:
VASTUS LATERALIS, VASTUS MEDIALIS, and VASTUS INTERMEDIUS (all the same)
Definition
O:ilium; INS:tibia via patellar ligament; ACT:extends leg; INNERV:femoral nerve
Term
Muscles of the Lower Limb:
Muscles of the anterior thigh compartment:
iliopsoas
(iliacus & psoas major)
Definition
O: illium and lumbar vertebrae; INS:femur; ACT:flexes thigh; INNERV:femoral nerve
Term
sartorius
Definition
O:ilium; INS:tibia; ACT:flexes thigh and leg, laterally rotates thigh; INNERV:femoral nerve
Term
Muscles of the Lower Limb:
Muscles of the posterior thigh compartment (hamstring muscles):
SEMITENDINOSUS/SEMIMEMBRANOSUS
Definition
O:ischium; INS:tibia; ACT:flexes leg, extends thigh; INNERV:sciatic nerve
Term
Muscles of the Lower Limb:
Muscles of the posterior thigh compartment (hamstring muscles):
BICEPS FEMORIS
Definition
O:ischium, femur; INS:fibula; ACT:flexes leg, extends thigh; INNERV:sciatic nerve
Term
Muscles of the Lower Limb:
Muscles of the medial (adductor) thigh compartment:
ADDUCTOR MAGNUS
Definition
O:ischium & pubis; INS:femur; ACTION adducts and extends thigh; INNERV:obturator and sciatic nerve
Term
Muscles of the Lower Limb:
Muscles of the medial (adductor) thigh compartment:
ADDUCTOR LONGUS
Definition
O:ischium & pubis; INS:femur; ACTION adducts thigh; INNERV:obturator nerve
Term
Muscles of the Lower Limb:
Muscles of the medial (adductor) thigh compartment:
gracilis
Definition
ORIG:ischium & pubis; INS:tibia; ACT:adduct thigh, medially rotate leg; INNERV:obturator nerve
Term
Muscles of the Lower Limb:
Muscles of the anterior compartment of the leg:
TIBIALIS ANTERIOR
Definition
O:tibia; INSERT:first metatarsal and medial cuneiform; ACT: dorsiflexes and inverts foot; INNERV:deep fibular (peroneal nerve)
Term
Muscles of the Lower Limb:
Muscles of the anterior compartment of the leg:
EXTENSOR DIGITORUM LONGUS
Definition
ORIG:tibia; INSERT: toes2-5; ACT:dorsiflex digits 2-5; INNERV:deep fibular (peroneal nerve)
Term
Muscles of the Lower Limb: Muscles of the lateral compartment of the leg:
FIBULARIS (peroneus) LONGUS
Definition
ORIG:fibula; INSERT:first metetarsal and medial cuneiform; ACT:plantarflexes & everts foot; INNERV:superficial fibular (peroneal) nerve
Term
Muscles of the Lower Limb: Muscles of the lateral compartment of the leg:
FIBULARIS (peroneus)BREVIS
Definition
ORIG:fibula; INS:fifth metatarsal ACT:plantarflexes & everts foot; INNERV:superficial fibular(peroneal) nerve
Term
Muscles of the posterior compartment of the leg:
GASTROCNEMIUS
Definition
O:femoral condyles; INS:calcaneus via achilles tendon; ACT:flexes leg & plantarflexes foot; INNERV:tibial nerve
Term
soleus
Definition
tibia, fibula calcaneus via achilles tendon plantar flexes the foot tibial nerve
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