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Anatomy > Axial Myology > Flashcards

Axial Myology Flashcards

1
Q

Epicranius Muscle

A

Origin- epicranial aponeurosis

Insertion- Occipital belly-occipital bone, Frontal belly-skin of eyebrows and nose, Lateral belly-muscle and cartilage of the auricle

Action-move the scalp

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2
Q

Corrugator Supercilii muscle

A

Origin- orbicularis oculi muscle and nasal prominence of the frontal bone

Insertion- skin of the eyebrow

Action- draw eyebrow downward and medially

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3
Q

Orbicularis Oculi muscle

A

Origin- the muscle that encirles the eyelid

Action-close the eyelid

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4
Q

Orbicularis Oris muscle

A

Origin- the muscle which encircles the oral opening

Action- close and purse the lips

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5
Q

Levator Labii Superioris muscle

A

Origin- maxilla and zygomatic bone

Insertion-into orbicularis oris muscle of the upper lip

Action-elevate upper lip

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6
Q

Levator Anguli Oris muscule

A

Origin-maxilla (canine fossa)

Insertion- orbicularis oris muscle and skin at corner of mouth

Action- raises angle of mouth

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7
Q

Zygomaticus Major muscle

A

Origin-zygomatic bone (near temporal fossa)

Insertion- orbicularis oris muscle at angle of mouth

Action-draw upper lip back and upward

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8
Q

Zygomaticus Minor muscle

A

Origin-zygomatic bone (near zygomaticomaxillary suture)

Insertion- into orbicularis oris muscle (and skin) of lower lip

Action- draw upper lip up and laterally

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9
Q

Depressor Labii Inferioris muscle

A

Origin- anterior aspect of mandible (between mandibular symphysis and mental foramen)

Insertion-into orbicularis oris muscle of lower lip

Action-depress lower lip

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10
Q

Depressor Anguli Oris muscle

A

Origin-anterior aspect of mandible

Insertion-into orbicularis oris muscle near corner of mouth

Action-depress corner of mouth

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11
Q

Nasalis muscle

A

Origin-maxilla

Insertion-into contralateral muscle (over bridge of nose) and into ala of nose

Action-wrinkle nose and dilate nostrils

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12
Q

Temporalis muscle

A

Origin- temporal fossa of skull

Insertion- coronoid process of mandible

Action-elevate mandilbe (clench teeth)

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13
Q

Masseter muscle

A

Origin-zygomatic arch of the skull

Insertion-coronoid process and lateral aspect of ramus of mandible

Action-elevate mandible

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14
Q

Lateral Pterygoid muscle

A

Origin-lateral wall of pterygoid process and adjacent greater wing of sphenoid bone

Insertion-condyloid process of mandible and articular disc of temporomandibular joint

Action-protract mandible, depress mandible (weakly)

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15
Q

Medial Pterygoid muscle

A

Origin- between the medial and lateral walls of the pterygoid process of the sphenoid bone, palatine bone, and maxilla

Insertion-medial aspect of the mandible

Action-elevate mandible and move it laterally

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16
Q

Platysma

A

Origin- fascia over pectoralis major muscle, and deltoideus muscle

Insertion- lower mandibular region

Action-depress lower lip, wrinkle skin of neck and upper chest

17
Q

Sternocleidomastoideus muscle

A

Origin-manubrium of the sternal extremity of the clavicle

Insertion-mastoid process of temporal bone

Action-turn head toward opposite side, flex joints of cervical vertebral column

18
Q

Pectoralis Major muscle

A

Origin- clavicle, sternum, first 6 ribs, and aponeurosis of external abdominal oblique muscle

Insertion- crest of greater tubercle of humerus and directly inferior to the greater tubercle of humerus

Action-flex shoulder joint, adduct and medially rotate limb at shoulder joint

19
Q

Pectoralis Minor muscle

A

Origin- ribs 3-5/6 near costochondral joint

Insertion-coracoid process of scapula

Action- draw scapula anterior and down, elevate ribs

20
Q

Serratus Anterior muscle

A

Origin-center of lateral aspects of 1-8 or 9 ribs

Insertion- medial border of scapula

Action- rotate scapula and pull it forward, elevate ribs

21
Q

External Intercostal muscles

A

Origin-inferior borders of ribs

Insertion- superior borders of ribs

Action-elevate ribs, maintain tension in the intercostal spaces

22
Q

Internal Intercostal muscles

A

Origin- inferior borders of ribs

Insertion- superior borders of ribs

Action-depress the ribs, maintain tension in the intercostal spaces

23
Q

Rectus Abdominis muscle

A

Origin- crest and symphysis of pubis

Insertion-xiphoid process of sternum and costal cartilages 5,6,7

Action-draw thorax downward, compress abdomen

24
Q

Tendinous Intersections of the rectus abdominis muscle across its belly form the rippled appearance of 6 pack

A well developed CT proper envelope termed **the sheath of the rectus abdominis muscle **

Linea Alba

A
25
Q

External Abdominal Oblique muscle

A

Forms the anterior layer of the sheath of the rectus abdominis muscle

Origin-ribs 5-12

Insertion- anterior lamina of the sheath of rectus abdominis musche, anterior half of iliac crest, inguinal ligament

Action-draw thorax downwatd, rotate vertebral column if contracted unilaterally

26
Q

Internal Abdminal Oblique muscle

A

Origin- anterior half of crest of ilium, lumbar fascia, iliac fascia, inguinal ligament

Insertion- ribs 10-12, sheath of rectus abdominis muscle

Action- draw thorax downward, compress abdomen and rotate vertebral column

27
Q

Transversus Abdominis muscle

A

Forms the posterior layer of the sheath of the rectus abdominis muscle

Origin- costal cartilages of fibs 7-12, lumbar fascia, iliac crest, inguinal ligament

Insertion- xiphoid process of sternum, posterios lamina of sheath of rectus abdominis muscle

Action- compress abdomen

28
Q

Trapezius muscle

A

Origin- Occipital bone, nuchal ligament, spinous porcesses of C7 and thoracic vertebrae

Insertion- clavicle, spine and acromion of scapula

Action-draw head laterally or posteriorly, rotate scapula

29
Q

Lattissimus Dorsi muscle

A

Origin- spinous processes of lower 5 or 6 thoracic vertebrae, those of the lumbar vertebrae and median sacral crest

Insertion-with teres major muscle into the medial border of the intertubercular groove of humerus

Action- adduct limb at shoulder joint, rotate limb medially at shoulder joint, extend shoulder joint.

30
Q

Rhombodeus Major muscle

A

Origin- spinous processes of thoracic vertebrae 2-5

Insertion- medial border of scapula below level of its spine

Action-pull (retract) scapula toward vertebral column

31
Q

Rhomboideus Minor muscle

A

Origin-spinous processes of C7-T1

Insertion-medial border of scapula at the level of its spine

Action-pull scapula toward vertebral column and slightly superiorly

32
Q

Levator Scapulae muscle

A

Origin- transverse processes of first 4 cervical vertebrae

Insertion- superior angle of scapula

Action- elevate scapula

33
Q

Spinalis muscle

Longissimus muscle

Iliocostalis muscle

A

Attachments- transverse processes of vertebrae, ribs and ilium

Action- extend joints of vertebral column, bend trunk laterally

Anatomy (6 decks)

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