Anatomy Muscles
Terms
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- triceps surae
- gastrocnemius and soleus
- gastrocnemius
- plantar flexes the foot and flexes the leg
- soleus
- plantar flexes the foot
- tibialis anterior
- dorsiflexes and inverts the foot
- tibialis posterior
- plantar flexes the foot and inverts
- peroneus longus
- plantar flexes and everts foot
- peroneus brevis
- plantar flexes and everts foot
- quadriceps femoris
- rectus femoris, vastus lateralis, vastus medialis, vastus intermedius
- rectus femoris
- flexes the thigh and extends the leg
- vastus lateralis
- extends the leg
- vastus medialis
- extends the leg
- vastus intermedius
- extends the leg
- sartorius
- flexes the leg, flexes and laterally rotates the thigh (sitting cross legged)
- hamstrings
- biceps femoris, semimembranous, semitendinosus
- biceps femoris
- flexes the leg and extends the thigh
- semimembranosus
- flexes the leg and extends the thigh
- semitendinosus
- flexes the leg and extends the thigh
- iliopsoas
- iliacus and psoas major
- iliacus
- flexes the thigh
- psoas major
- flexes the thigh
- tensor fascia latae
- flexes and abducts the thigh
- gluteus maximus
- extends and laterally rotates the thigh
- gluteus medius
- abducts and medially rotates the thigh
- gluteus minimus
- abducts and medially rotates the thigh
- gracilis
- adducts the thigh and flexes the leg
- adductor magnus
- adducts and laterally rotates the thigh (more posterior)
- adductor longus
- adducts and flexes and laterally rotates the thigh (more anterior)
- adductor brevis
- adducts and laterally rotates and flexes the thigh
- hand flexors
- flex the hand (anterior)
- hand extensors
- extend the hand (posterior)
- biceps brachii
- flexes and supinates the forearm
- brachialis
- flexes the forearm
- brachioradialis
- flexes the forearm
- triceps brachii
- extends the forearm
- pectoralis major
- flexes, adducts, and medially rotates the arm
- latissiumus dorsi
- adducts, extends, and medially rotates the arm
- deltoid
- abducts and flexes the arm
- supraspinatus
- abducts the arm
- infraspinatus
- laterally rotates the arm
- teres major
- extends, adducts, and medially rotates the arm
- rotator cuff
- subscapularis, infraspinatus, teres minor, supraspinatus (SITS)
- pectoralis minor
- depresses and protracts the scapula
- trapezius
- adducts, elevates, depresses scapula, extends the head, elevate the clavicle
- levator scapulae
- elevates the scapula
- rhomboid major
- adducts and inferiorly rotates the scapula
- rhomboid minor
- adducts and inferiorly rotates the scapula
- rectus abdominus
- flexes the vertebral column and compresses the abdomen
- external oblique
- rotation of the trunk, compression of the abdomen
- internal oblique
- rotation of the trunk, compression of the abdomen
- transverse abdominis
- compression of the abdomen
- erector spinae muscles
- iliocostalis, longissimus, spinalis
- function of erector spinae muscles
-
ind: laterally flex and rotate the vertebral column
group: muscles extend the vertebral column - diaphragm
- moves downward during inspiration, increase dimensions of the thorax
- external intercostals
- pulls ribs upward and together to expand thorax (labored inspiration)
- internal intercostals
- pulls ribs downward and together to decrease thorax (forced expiration)
- epicranius frontalis
- raises the eyebrows
- epicranius occipitalis
- draws scalp posteriorly
- orbicularis oris
- puckers mouth as in kissing
- orbicularis oculi
- closes each eye as in blinking
- zygomaticus
- pulls the corners of the mouth as in smiling
- platysma
- depresses the lower lip and mandible
- temporalis
- elevates and retracts the mandible
- masseter
- elevates and protracts the mandible
- sternocleidomastoid
- head rotates, flexion of the head