Chapter 11 - Muscle Structure Flashcards
name the muscle.
frontalis
*forehead is “frontal”, lies on the frontal bone.
name the muscle labeled in yellow.
orbicularis oculi. it an “orbicular” shape that “orbits” the eye. “oculi” means eye. think of bin-oculars.
name the muscle.
orbicularis oris
- orbits the mouth
name the muscle labeled in lavender.
mentalis
- mental is chin. imagine the thinking pose with your fist on your chin, in mental thought
name the muscle in green.
masseter
- mastication is chewing. masseter means the chewing muscle.
name the muscle.
depressor anguli oris
- to lower the corner of the mouth
- they also look like triangles
*anguli means “corner”
name the muscle.
depressor labii inferioris
- to pull down the lips, lower
name the muscle.
risorius
- “la risa” is laughter in spanish
name the muscle.
levator labii superioris.
- to lift the lips towards the head
name the muscle labeled in yellow
buccinator
- attaches to the orbicularis oris, allows us to push air out of the mouth when playing an instrument.
name the muscle.
occipitalis. lies on the occipital bone in the occipital region.
name each of the the 3 muscles.
*auricularis means “outer ear”. think auditory.
- auricularis anterior
- auricularis superior
- auricularis posterior
go over the chart for naming muscles…
muscles are named for size, shape, direction of fibers, location, number of origins, origin and insertion, and action.
name both the sets of muscles
zygomaticus minor (top pair)
zygomaticus major (bottom pair)
*similar to the teres m&m and the rhomboid m&m, the major is below the minor.
name the muscle
levator anguli oris
- to lift the corners of the mouth
*anguli means “corner”
name the muscle.
temporalis
- lies on the temporal bone.
- a major muscle of mastication
name the muscle
sternocleidomastoid (SCM)
- attaches at sternum, clavicle, and mastoid process.
name the muscle
levator scapulae
- lifts the scapulae. parallel with the rhomboids.
- deep to the scalenes
the suboccipital muscles. you don’t need to know these, but they’re pretty cool.
there’s 4 pairs that attach to the occipital bone, atlas, axis, and cervical vertebrae
the semispinalis capitus. you don’t need to know this, but it’s cool.
good stuff. semi means just to the side, spinous is of the spine
the longissimus capitus. you don’t need to know this…
the top most portion of the erector spinae muscle groups
a cool layering of neck muscles
name the muscle
splenius capitus
- splenius means “bandage”
- this is the muscle that babies develop to hold their heads up
name the muscle.
sternohyoid
- attaches the sternum to the hyoid bone.
name the muscle
omohyoid
- attaches the scapula to the hyoid bone
- omo refers to the scapula
name the muscles.
external intercostal muscle
- attaches each rib to another
- runs from spine all the way to where ribs become cartilage.
- fibers are angled posteriorly/superiorly, or anterior/inferior.
- elevates the ribs in inspiration
*Intercostals create a pressure chamber wall for respiration
name the muscles.
internal intercostal muscle
- attaches each rib to another
- fibers run in opposite direction from external intercostal muscles.
- runs from sternum all the way to the angle of the ribs on the posterior side. about 3/4 of the way from sternum to spine.
- lowers the ribs in expiration
*Intercostals create a pressure chamber wall for respiration
also have an innermost intercostal…
- runs with internal intercostals, but separate.
*Intercostals create a pressure chamber wall for respiration
name the muscle
transversus thoracis
name the muscle.
*what is the name of the fibrous midline?
rectus abdominus
*linea alba, or “white line”
name the muscle.
external oblique
- fibers run posterior and superior.
- same direction as external intercostals
- does not attach to aponeurosis on posterior side, but does form an aponeurosis on front that runs anterior on the rectus abdominus.
name the muscle
internal oblique
- attaches from the posterior aponeurosis to the anterior aponeurosis
- muscle fibers run the same as internal intercostals, anterior/superior or posterior/inferior.
- front aponeurosis splits in two and goes anterior & posterior to rectus abdominis.
name the muscle
transversus abdominis
- runs from the posterior fascia (thoracolumbar fascia) to the anterior aponeurosis
- similar to the innermost intercostals.
- front aponeurosis stays posterior to other aponeurosis and behind rectus abdominus.
name the 3 muscles. what is their name combined?
- psoas minor
- psoas major
- iliacus
*all together make iliopsoas