lab 3: head, neck, trunk, pectoral girdle Flashcards
obicularis oculi m. action
closes eye
obicularis oris m. action
compresses and purses lips
zygomaticus major m action
elevates corner of mouth and draws it laterally
levator labii superioris m. action
elevates and everts upper lip
depressor labii inferioris m. action
depresses and everts lower lip
platysma muscle action
tenses skin of neck, depresses mandible
masseter m action
elevates mandible, closes jaws; assists in protracting and retracting mandible
temporalis m. action
elevates mandible and closes jaws, assists in retracting and moving mandible from side to side
medial pterygoid m action
elevates the mandible and closes jaws, moves mandible side to side
lateral pterygoid m action
opens jaws, protrudes mandible, moves mandible side to side
intrinsic muscles lie…
lie completely within the tongue
move the tongue
extrinsic muscles…
attach tongue to the mandible, hyoid, temporal bone and soft palate
move the tongue
sternocleidomastoid m attachments (3) and actions
clavicle, sternum, mastoid process of the skull
acting bilaterally: flex the neck
acting unilaterally: bends the neck towards shoulder and turns face to opposite side
subclavius: origin, insertion, action
origin: first rib
insertion: inferior border of middle third of clavicle
action: depresses and protracts pectoral girdle
pectoralis minor m: origin, insertion, action
origin: ribs 3-5 (anterior surfaces and superior margin)
insertion: coracoid process of scapula
action: depresses and protracts scapulae, elevated ribs if scapulae are stationary, downward rotation of scapula
serratus anterior muscle: origin, insertion, action
origin: anterior and superior margins of ribs 1-8/9/10
insertion: anterior surface of vertebral border of scapula
action: protracts shoulder, rotates scapula so glenoid fossa moves superiorly
levator scapulae m: origin, insertion, action
origin: C1-C4 vertebrae at transverse processes
insertion: medial border of scapula
action: elevates scapulae, lateral flexion of neck to same side
rhomboid major and minor m: origin, insertion, action
origin: spinous processes of C7-T6
insertion: medial border of scapula
action: adduction and retraction and downward rotation of scapula
trapezius upper fibers: origin, insertion, action
origin: occipital bone
insertion clavicle
action: elevation/upper rotation of scapula
trapezius middle fibers: origin, insertion, action
origin: ligamentum nuchae
insertion: acromion spine of scapula
action: retraction of scapula
trapezius lower fibres: origin, insertion, action
origin: spinous processes or thoracic vertebrae
insertion: acromion spine of scapula
action: depression of scapula
what sits in the foramen magnum
brain stem and spinal cord
brow ridge is called the
supraorbital margin
eyebrow ridge is called the
superciliary arches
anatomical name for cheekbone
zygomatic arch
what attaches to the pterygoid processes
anchors jaw muscles that move the lower jaw and soft palate
crista galli function
attachment sire for fibrous membrane of the brain
- aids in securing brain within cranial cavity
cribriform plate function
- helps make up the roof of the nasal cavity
- olfactory nerves pass through
perpendicular plate forms what
forms nasal septum with vomer bone and hyaline cartilage
superior and middle nasal conchae function
mucous secretions from the air cells flush surfaces of the nasal cavity
what lies in the submandibular fossa
submandibular salivary gland
hyoid bone function
supports larynx and serves as a base for muscles that move the tongue
- isn’t in direct contact with any other bone of the skeleton
what passes through vertebral foramen
vertebral arteries and veins
superior and inferior costal facets articulate with
superior and inferior articular facets
transverse costal facet of vertebrae articulates with
tubercles of ribs
coccyx fuses at what age
26
what attaches to xiphoid process on sternum
muscular diaphragm and rectus abdominis muscle
sternoclavicular joint and ligament
diarthrotic synovial monaxial planar joint
-anterior sternoclavicular ligament
2 ligaments on shoulder model
acromioclavicular ligament (8) coracoclavicular ligament (9)
where do the muscles of the face insert
dermis of skin and superficial fascia to move the skin
scalene muscles action
elevate ribs, flex neck
side of neck
longissmus thoracis action
extends vertebral column, lateral flexion to same side
base of back by lumbar vertebrae
splenius capitis action
rotates and laterally flexes neck to same side
on top of spine by occipital bone
