Lab 7 Flashcards
1
Q
Muscles of facial expressions
A
- orbicularis Oris
- orbicularis oculi
- buccinator
- zygomaticus major
- frontalis
2
Q
Orbicularis Oris
A
- action: puckers/closes lips
- attachments: maxilla and mandible - skin around the lips
3
Q
Orbicularis Oculi
A
- action: closes eyelids
- attachments: frontal lobe - skin around the eye
4
Q
Buccinator
A
- action: tightens cheeks, keeps food on the teeth
- attachments: maxilla and mandible - orbicularis Oris
5
Q
Zygomaticus major
A
- action: pulls side of lip laterally and superiorly (smile)
- attachments: zygomatic bone and soft tissues of the lip
6
Q
Frontalis
A
- action: raises eyebrows
- attachments: scalp - orbicularis oculi
7
Q
Extraocular muscles
A
- superior rectus - SR
- inferior rectus - IR
- medial rectus - MR
- lateral rectus - LR
- superior oblique - SO
- inferior oblique - IO
Attachments
- common tendinous ring and sphenoid (maxilla) - eye
8
Q
Superior rectus
A
- elevates and adducts eye
9
Q
Inferior rectus
A
- depress and adduct eye
10
Q
Medial rectus
A
- adducts eye
11
Q
Lateral rectus
A
- abducts eye
12
Q
Superior Oblique
A
- depresses and abducts eye
13
Q
Inferior oblique
A
- elevates and abducts eye
14
Q
Levator Palpebrae Superioris
A
-action: raise superior eyelid
- attachments: back of orbit - superior eye lid
15
Q
Muscles of mastication
A
- temporalis
- masseter
- pterygoid: lateral and medial
16
Q
Temporalis
A
- action: elevates and retracts mandible
- attachments: lateral cranium - coronoid process of mandible
17
Q
Masseter
A
- action: elevates and protrusion of mandible
- attachments: zygomatic arch - angle of mandible
18
Q
Medial Pterygoid
A
- action: elevates and protracts mandible, side to side grinding
- attachments: sphenoid - mandible
19
Q
Lateral Pterygoid
A
- action: depress and protrude the mandible, side to side movement
- attachment: sphenoid - mandible
20
Q
Genioglossus
A
- action: protracts and protrudes tongue
- attachments: mandible - tissues of the tongue
21
Q
Sternocleidomastoid
A
- unilateral action: flexes the neck to the same side while rotating head to face opposite side
- bilateral action: extends head, flexes neck
- attachments: sternum, clavicle - mastoid process of temporal bone
22
Q
Intrinsic back muscles
A
Erector Spinae: spinalis, longissimus, and iliocostalis
- unilateral action: laterally flex (ipsilaterally) trunk, neck and head
- bilateral action: extend trunk, neck, and head
- attachments: spinous processes, ilium, sacrum - spinous processes, transverse processes, ribs
23
Q
Muscles of the thorax
A
- respiratory diaphragm
- Intercostal muscles: external and internal
24
Q
Respiratory Diaphragm
A
- main muscle of respiration
- action: depresses and flattens to increase size of the thoracic cavity during inhalation
- attachments: xiphoid process, costal cartilages, ribs, lumbar vertebrae - central tendon
25
External Intercostal
- action: elevate ribs during inspiration
- attachments: adjacent superior and inferior rib margins
26
Internal intercostals
- action: depress ribs during expiration
- attachments: adjacent superior and inferior rib margins
27
Muscles of the abdominal wall
- rectus abdominis
- external oblique
- internal oblique
- transverse abdominis
28
Rectus abdominis
- fibers run superior/inferior
- action: flexes trunk
- attachments: xiphoid process and ribs - pubis and pubic symphysis
29
External abdominal oblique
- fibers run obliquely from superolateral to inferomedial
- action: flex and rotate trunk (contralaterally)
- attachments: lower ribs - iliac crest, pubis, inguinal ligament, linea alba
30
Internal abdominal olique
- fibers run obliquely from superomedial to inferolateral
- action: flex and rotate trunk (ipsilaterally)
- attachments: iliac crest, inguinal ligament - linea alba
31
Transverse abdominis
- deepest ab muscles
- fibers run transversely
- action: compress abdominal cavity for exhalation
- attachments: posterior body wall - linea alba and anterior body wall
32
Pelvic Diaphragm
- make up the pelvic floor and support abdominal contents
- contains two hiatuses (holes) to allow passage of urethra/vagina and rectum
- Levator ani
- coccygeus
33
Levator ani
- iliococcygeus
- pubococcygeus
- puborectalis
- action: support pelvic viscera
- attachments: inner surfaces of true pelvis - coccyx, opposite side of levator ani
34
Coccygeus
- action: support pelvic viscera
- attachments: ischial spine - coccyx
