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MCB 244 Exam III-Muscles
Muscles
114
Anatomy
Undergraduate 2
11/11/2011

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Term
Orbicularis oris
Definition
Surrounds Mouth
Compresses, purses lips
Term
Buccinator
Definition
Inbetween maxilla and orbicularis oris
Compresses cheeks
Term
Orbicularis Oculi*
Definition
Surrounds Eye
Closes eye
Medial margin of orbit
Skin around eyelids
Term
Temporoparietalis*
Definition
Over temporal bone
Tenses scalp
Fascia around external ear
Epicranial aponeurosis
Term
Occipitofrontalis - front belly*
Definition
Forehead Muscle
raises eyebrowns, wrinkles forehead
Epicranial aponeurosis
skin of eyebrow and bridge of nose
Term
Occipitofrontalis- occipital belly*
Definition
Tenses and retracts scalp
occipital bone and mastoid region
epicranial aponeurosis
Term
Platysma*
Definition
Superficial layer around neck
Tenses skin of neck, depresses mandible
superior thorax between cartilage of 2nd rib and acromonion of scapula
mandible and skin of cheek
Term
Inferior Rectus
Definition
Look down
Term
Medial Rectus
Definition
Look Medially
Term
Superior rectus
Definition
Look up
Term
lateral rectus
Definition
look laterally
Term
inferior oblique
Definition
eyes roll, look up and laterally
Term
superior oblique
Definition
eye roll, looks down and laterally
Term
Masseter*
Definition
elevates mandible and closes the jaws
Zygomatic arch
mandibular ramus
Trigeminal Nerve
Term
Temporalis*
Definition
Deep to temporalparietalis
elevates mandible
temporal line
mandible
Term
Pterygoid muscles (medial and lateral)
Definition
Medial-elevates mandible and closes jaw
lateral-opens jaw and protrudes the mandible
Term
Palatoglossus*
Definition
Tongue
elevates tongue
soft palat
tongue
Term
Styloglossus*
Definition
tongue
Retracts tongue
temporal bone
tongue
Term
Genioglossus*
Definition
Tongue
Depresses and protracts tongue
mandible
tongue
Term
Hyoglossus*
Definition
tongue
depresses and retracts
hyoid bone
tonge
Term
Digastric
Definition
depresses mandible and elevates larynx
Term
Mylohyoid*
Definition
elevates floor of mouth/depresses mandib;e
mandible
hyoid bone
Term
Geniohyoid*
Definition
pulls hyoid bone anteriorly
mandible
hyoid bone
Term
Stylohyoid*
Definition
Elevates larynx
temporal bone
hyoid bone
Term
Sternocleidomastoid*
Definition
Flex neck
clavicular head and sternal head
mastoid region of skull
Accessory Nerve
Term
Omohyoid*
Definition
scapula
hydoid bone
Term
Erector Spinae
Definition
Term
Spinalis Muscles
Definition
Spinous processes of individual vertebrae
Extends neck and vertebral column
Term
Longissimus muscles
Definition
connects to transverse processes
-either cervical to mastoid
-thoracic to cervical
-or lumbar to ribs and superior vertebrae
extend head, rotate and flex neck
Term
iliocostalis muscles
Definition
Borders of ribs or pelvis to transverse processes
stabilze vertebrae, elevate ribs, extend vertebrae column
Term
Longus Capitis
Definition
Rotate and laterally flex the neck and extend head
Term
Longus colli
Definition
Flex or rotate neck, limits hyperextension
Term
Quadratus lumborum
Definition
Depress ribs, and laterally flexes vetrebral column
Term
Rotatores*
Definition
Transverse process of one vertebrea to adjacent spinous process moving superiorly
-Extends vertebral column and rotates toward opposite side
Tranverse process of each vetrebrae
Spinous process of adjacent, superior vertebra
Term
Interspinales*
Definition
-Two on each side, that extend from one spinous process to the next
-Extend vertebral column
-spinous process of each vertebra
-adjacent superior spinous process
Term
Intertransversarii*
Definition
Connect transverse processes
Laterally flexes vertebral column
transverse process of each vertebra
adjacent superior transverse process
Term
Scalenes
Definition
Cervical vertebrae to first two ribs
elevates ribs or flex neck
Term
Interneal intercostals
Definition
Inbetween the ribs
depresses ribs
Superior border of rib
inferior border of preceding rib
Term
External intercostals
Definition
Inbetween ribs
Elevates ribs
Inferior border of rib
superior border of more inferior rib
Term
External oblique
Definition
Superficial to internal oblique
Compresses abdomen, depresses ribs, flexes or bends spine
Term
Internal Oblique
Definition
Deep to external oblique
compresses abdomen, depresses ribs, flexes or bends spine
Term
Transverse abdominis
Definition
Deep to internal oblique
Compresses abdomen
Term
Rectus abdominis
Definition
Abs
Depresses ribs, flexes vertebral column, compresses abdomen
Term
Diaphragm
Definition
Contraction expands thoracic cavity
Compresses abdominopelvic cavity
Term
Bulbospongiosus
Definition
Part of the Urogenital Triangle
In males-base of penis
Stiffens penis, ejects urine or semen
In females- at base of clitoris, run on either side of urethra
Compresses or stiffens clitoris, narrows vaginal openeing
Term
Ishiocavernosus
Definition
Part of the Urogenital Triangle
Base of penis or clitoris
Stiffens and compresses clitoris or penis
Term
External urethral sphincter
Definition
Part of the Urogenital Triangle
-males-compresses urethra and compresses prostate
-females-closes urethra and compresses vagina
Term
Levator ani
Definition
Part of anal triangle
-composed of the puboccygenus and Iliococcygenus muslces that surround the anus.
Tenses floor of pelvis, elevates and retracts anus
Term
External anal sphincter
Definition
Part of anal triangle
Directly surrounds anus
closes anal opening
Term
Trapezius
Definition
covers scapula
Elevates, retracts, or rotates scapula or elevates clavical
Term
Rhomboid Major*
Definition
Deep to trapezius, inferir to Rhomboid minor
Adducts scapula and downward rotation
Thoracic vertebrae
Scapula
Term
Rhomboid Minor*
Definition
Deep to Trapezius, superior to Rhomboid Major
Adducts scapula and downward rotation
Cervical and top Thoracic (c7-T1)
Scapula
Term
Serratus anterior*
Definition
Covers ribs to scapula
Rotates scapula and protracts shoulder
Ribs
Scapula
Term
Levator Scapulae*
Definition
Superior to Rhomboid minor
Elevates Scapula
Upper cervical vertebrae
Scapula
Term
Deltoid*
Definition
Clavicle to Humerus
Abducts shoulder
Axillary nerve
Term
Supraspinatus*
Definition
Covers Supraspinous fossa
Abducts shoulder
Scapula
Humerus
Term
Infraspinatus*
Definition
Covers Infraspinous fossa
Lateral rotation of shoulder
Scapula
Humerus
Term
Subscapularis*
Definition
Covers subscapular fossa
Medial rotation of shoulder
Scapula
Humerus
Term
Teres Major*
Definition
Arm pit muscle, inferior to minor
Extension, adduction medial rotation
Scapula
Humerus
Term
Teres Minor*
Definition
Arm pit muscle superior to major
lateral rotation at shoulder
Scapula
Humerus
Term
Pectoralis major
Definition
Ribs, sternum, clavicle to Humerus
Flexion, adduction and medial rotation
Medial and Lateral Pectoral Nerve
Term
Latissiumus dorsi
Definition
Under arm to spine
extension, adduction and medial rotation at shoulder
Term
Biceps brachii*
Definition
Scapula to radius
Flexion at elbow
Musculocutaneous Nerve
Term
Brachialis
Definition
Covers humerus
Term
Triceps brachii*
Definition
Humerus and scapula to ulna
Extension at elbow
Radius Nerve
Term
Brachioradialis
Definition
Anterior side of forearm superficial to radius--in line with thumb
flexion at elbow
Term
Anconeus
Definition
goes from humerus to ulna- crosses under extensor carpi radialis longus and is just lateral to tricep insertion
Extension at elbow
Term
Palmaris longus
Definition
flexion at wrist
Term
flexor Carpi ulnaris
Definition
flexion and adduction at wrist
Term
Flexor carpi radialis
Definition
flexion and abduction at wrist
Term
Extensor carpi radialis
Definition
extension and abduction of wrist
Term
Extensor carpi ulnaris
Definition
extension and adduction of wrist
Term
Pronator teres
Definition
Pronation
Term
Supinator
Definition
Supination
Term
Pronator quadratus
Definition
Pronation
Term
Abductor pollicis longus
Definition
abduction of thumb and wrist
Term
Extensor digitorum
Definition
extension at finger joints and wrist
Term
Extensor pollicis brevis
Definition
Extension at joints of thumb
abduction at wrist
Term
Extensor pollicis longus
Definition
Extension at thumb
Abduction at wrist
Term
Extensor indicis
Definition
Extension and adduction of index finger
Term
Extensor digiti minimi
Definition
extension of little finger
Term
Flexor digitorum superficialis
Definition
flexion of wrist joints and fingers
Term
flexor digitorum profundus
Definition
flexion at wrist and fingers
Term
Flexor pollicis longus
Definition
flexion at joints of thumb
Term
Gluteus Maximus
Definition
Extension and lateral rotation at hip
Term
Gluteus medius
Definition
Abduction and medial rotation at hip
Term
Gluteus minimus
Definition
Abduction and medial rotation at hip
Term
Tensor fasciae latae
Definition
Flexion and medial rotation at hip
Term
Piriformis
Definition
Lateral rotation and abduction at hip
Term
Obturator group
Definition
Lateral rotation at hip
Term
Adductor group
Definition
Adduction, flexion, and medial rotation
Term
Pectineus
Definition
Flexion, medial rotation and adduction
Term
Gracilis
Definition
Flexion, adduction and medial rotation
Term
Iliacus
Definition
Covers illium
flexion at hip
Term
Psoas major
Definition
Goes from Lumbar vertebrae to femur
flexion at hip or lumbar vertebrae joints
Term
Bicep femoris
Definition
Flexion at knee, extension and lat rotation of hip
Term
Semimembranosus
Definition
Flexion at knee and extension/medial rotation of hip
Term
Semitendinosus
Definition
Flexion at knee and extension/medial rotation of hip
Term
Sartorius
Definition
Flexion at knee and lateral rotation of hip
Term
Popliteus
Definition
Medial rotation of tibia and flexion at knee
Term
Rectus femoris
Definition
Illium to Tibia
Extension at knee
Femoral Nerve
Term
Vastus lateralis
Definition
Lateral quad muscle
Extension at knee
Term
Vastus intermedius
Definition
Deep to rectus femoris
Extension at knee
Term
Vastus medialis
Definition
Most medial quad muscle
Extension at knee
Term
Gastrocnemius
Definition
Extension at ankle, inversion of foot, flexion at knee
Term
Soleus
Definition
Extension at ankle
Term
Fibularis group
Definition
Eversion of foot and extension at ankle
Term
Tibialis posterior
Definition
Adduction and inversion of foot
Term
Flexor digitorum longus
Definition
flexes joints 2-5 of toe
Term
Flexor hallucis longus
Definition
Flexes great toe
Term
Extensor digitorum longus
Definition
extension of toes 2-5
Term
Extensor hallucis longus
Definition
extension of hallux
Term
Bicep Femoris
Definition
Ischium to Tibia
Flexion at the knee
Sciatic Nerve
Term
Gastrochnemius
Definition
Femur to Calcaneous
Extension at ankle
Tibial Nerve
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