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Anatomy lab > Unit 8 Axial Muscles > Flashcards

Unit 8 Axial Muscles Flashcards

1
Q

muscles of the head

A

44 muscles of the head that are divided into 6 subgroups

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2
Q

muscles of the face

A

22 muscles called” muscles of the facial expression”

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3
Q

epicranius muscle

A

muscles of the scalp

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4
Q

epicranial/ galea aponeurosis

A

Origin: epicranial aponeurosis Insertion: occipital belly- occipital bone; frontal belly- skin of the eyebrow and nose; lateral bellies- muscle and cartilages of the auricle Action: more the scalp, wrinkle brow, wiggle ears

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5
Q

orbicularis oculi muscle

A

Origin: itself Insertion: itself Action: close eyelids

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6
Q

corrugator supercilii muscle

A

Origin: medial aspect of the superciliary arch of the frontal bone Insertion: skin of eyebrow Action: draw eyebrow downward and medially

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7
Q

orbicularis oris muscle

A

Origin: itself Insertion:itself Action: close and purse the lip

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8
Q

levator labii superioris muscle

A

Origin: maxilla & zygomatic bone Insertion: into orbicularis iris muscle of the upper lip Action: elevate upper lip

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9
Q

levator anguli oris muscle

A

Origin: maxilla Insertion: orbicularis fris mscle and skin at corner of the mouth Action: raises angle of mouth

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10
Q

zygomaticus major muscle

A

Origin: zygomatic bone Insertion: orbicularis fris muscle at the angle (corner) of the mouth Action: draw upper lip back and upward

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11
Q

zygomaticus minor muscle

A

Origin: zygomatic bone Insertion: orbicularis fris and levator labii superioris muscle Action: draw upper lip pi and laterally

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12
Q

depressor labii inferioris muscle

A

Origin: anterior aspect of the mandible Insertion: into the orbicularis iris muscle and skin of the lower lip Action: depress lower lip

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13
Q

depressor anguli oris muscle

A

Origin: anterior aspect of the mandible Insertion: into the orbicularis oris muscle near the corner of mouth Action: depress corner of mouth

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14
Q

nasalis muscle

A

Origin: maxilla Insertion: into the contralateral nasalis muscle and into the ala of the nose Action: wrinkle and dilate nostrils

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15
Q

muscles of mastication

A

4 pair of muscles “closing the jaw”

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16
Q

temporalis muscle

A

Origin: temporal fossa Insertion: coronoid process and rams of the mandible Action: elevate mandible

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17
Q

masseter muscle

A

Origin: zygomatic arch Insertion: coronoid process and lateral aspect of the rams of the mandible Action: elevate mandible

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18
Q

lateral pterygoid muscle

A

Origin: lateral plate f the pterygoid process & adjacent greater wing of the sphenoid bone Insertion: condyloid process of the mandible and articular disc of the temporomandibular joint Action: protract mandible, depress mandible

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19
Q

medial pterygoid muscle

A

Origin: between the medial and lateral plates of the pterygoid process of the sphenoid bone, palatine bone, and maxilla Insertion: medial aspect of the mandible Action: elevate mandible, move it laterally

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20
Q

muscles of the neck

A

33 paired muscles that divide into 6 subgroups

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21
Q

platysma

A

Origin: fascia over the pectorals major and deltoids muscles Insertion: lower mandibular region Action: depress lower lip, wrinkle skin of neck and upper chest

22
Q

sternocleidomastoideus muscle

A

Origin: manubrium of the sternum and sternal extremity of the clavicle Insertion: mastoid process of the temporal bone Action: turn head toward opposite side; flex joints of cervical vertebral column

23
Q

muscles of the thorax

A

7 paired muscles are not subdivided

24
Q

pectoralis major muscle

A

Origin: clavicle, sternum, first 6 ribs and aponeurosis of external abdominal oblique muscle Insertion: inter tubercular groove of the humerus and greater tubercle of the humerus Action: flex shoulder joint, adduct superior limb at shoulder joint, medially rotate superior limb

25
Q

pectoralis minor muscle

A

Origin: ris 3-5/6 near costochondral joints Insertion: coracoid process of the scapula Action: draw scapula anterior and down, elevate rib

26
Q

serratus anterior muscle

A

Origin: center of lateral aspects of the 1st 8 or 9 ribs Insertion: medial border of the scapula Action: rotate scapula and pull it forward elevate ribs

27
Q

external intercostal mm

A

Origin: inferior borders of the ribs Insertion: superior borders of the ribs Action: elevate ribs, maintain tension in the intercostal spaces

28
Q

internal intercostal mm

A

Origin: inferior borders of the ribs Insertion: superior borders of the ribs Action: depress the ribs, maintain tension in the intercostal spaces

29
Q

diaphragm

A

thoracic muscle, 3 parts and 2 legs

30
Q

muscles of the abdomen

A

4 paired principle muscles of the abdominal wall

31
Q

rectus abdominis muscle

A

straight abdominal muscle

32
Q

tendinous intersection of the rectus abdominis muscle

A

horizontal tendons across the belly of the rectus

33
Q

sheath of the rectus abdominis muscle

A

well-developed connective tissue surrounds the belly of the rectus abdominis muscle

34
Q

anterior layer of the sheath of the rectus abdominis muscle

A

formed by aponeuroses of the external abdominal oblique and internal abdominal oblique muscles

35
Q

linea alba

A

Origin: pubic crest and pubic symphysis Insertion: diploid process of the sternum and costal cartilages 5, 6, &7 Action: draw thorax downward (flex joint of vertebral column) compress abdomen

36
Q

external abdominal oblique muscle

A

Origin: ribs 5-12 Insertion: anterior lamina of the sheath of recus abdominis muscle, linea alba, anterior half of the iliac crest, inguinal ligament Action: draw thorax downward (flex joints of the vertebral column) compress abdomen rotate verbal column

37
Q

internal abdominal oblique muscle

A

Origin: anterior half of the crest of the ilium, inguinal ligament Insertion: ribs 10-12 sheath of the rectus abdominis muscle linea alba Action: draw thorax downward ( flex joint of vertebral column) compress abdomen, rotate vertebral column

38
Q

transversus abdominis muscle

A

Origin: costal cartilages of ribs 7-12, iliac crest, inguinal ligament Insertion: xiphoid process of the sternum, posterior lamina of sheath of the rectus abdominis muscle, linea alba Action: compress abdomen

39
Q

urogenital diaphragm

A

anterior floor of the pelvic cavity

40
Q

pelvic diaphragm

A

muscles that form the posterior portion of the pelvic floor

41
Q

muscles of the back

A

paired muscles dived into 6 sub groups

42
Q

trapezius muscle

A

Origin: occipital bone, spinous process of c7 and thoracic vertebrae Insertion: clavicle, spine and acromion of the scapula Action: draw head laterally or posteriorly, rotate scapula

43
Q

latissimus dorsi muscle

A

Origin: spinous process of the lower five or 6 thoracic vertebrae, those of the lumbar vertebrae and median crest of the bony sacrum Insertion: with teres major muscle into the medial border of the intertubercular groove Action: adduct superior limb at shoulder joint, rotate superior limb medially at shoulder joint, extend shoulder joint

44
Q

rhomboideus major muscle

A

Origin: spinous processes of thoracic vertebrae 2-5 Insertion: medial border of the scapula below level of its spine Action: pull scapula toward vertebral column

45
Q

rhomboideus minor muscle

A

Origin: spinous process of C7 and T1 Insertion: medial border of the scapula at the level of its spine Action: pull scapula toward vertebral column and slightly superiorly

46
Q

rhomboideus minor muscle

A

Origin: spinous process of C7 and T1 Insertion: medial border of the scapula at the level of its spine Action: pull scapula toward vertebral column and slightly superiorly

47
Q

levator scapulae muscle

A

Origin: transverse process of the first four cervical vertebrae Insertion: superior angle of the scapula Action: elevate scapula

48
Q

erector spine muscles

A

muscles lie adjacent to the spinous processes of the vertebrae

49
Q

spinalis muscle

A

Action: extend joints of the vertebral column, lateral flexion of the vertebral joints

50
Q

longissimus muscle

A

Action: extend joints of the vertebral column, lateral flexion of the vertebral joints

51
Q

iliocostalis muscle

A

Action: extend joints of the vertebral column, lateral flexion of the vertebral joints

52
Q
A

Anatomy lab (15 decks)

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