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Unit 3 > Chapter 11 > Flashcards

Chapter 11 Flashcards

1
Q

Occipitofrontalis

A

Frontal belly- draws scalp anteriorly
-look of surprise
Occipital belly- draws scalp posteriorly

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2
Q

Orbicularis oris

A

Closes and protrudes lips (kissing)
Compresses lips against teeth
Shapes lips during speech

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3
Q

Zygomaticus major

A

Draws angle of mouth superiorly and laterally (smiling)

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4
Q

Buccinator

A

Presses cheeks against teeth and lips
Draws corners of mouth laterally
Assists in mastication

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5
Q

Orbicularis oculi

A

Closes eye

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6
Q

Masseter

A

Origin=maxilla and zygomatic arch
I=angle and ramus of mandible
A=elevates mandible

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7
Q

Temporalis

A

O=temporal bone
I=coronoid process and ramus of mandible
A=retraction and elevation of mandible

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8
Q

Sternocleidomastoid

A

O=Sternal head =manubrium of sternum
Clavicular head=medial 3rd of clavicle
I= mastoid process of temporal bone and lateral half of superior nochal line of occipital
A=bilaterally= flexion of cervical spine and extension of head at atlanto occipital
Unilaterally- flexion of head and neck to same side and rotate head to opposite side of contracting muscles
And rotate and flex head to opposite side of contracting muscles
Rma=elevates sternum in forced inhalation

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9
Q

Rectus abdominis

A

O= pubic crest and pubic symphysis
I=cartilage of ribs 5-7 and xiphoid process
A=flexes vertebral column (lumbar) and compresses abdomen to aid in defecation, urination, forced exhalation and child birth
Rma= flexion of pelvis in vertebral column

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10
Q

External obliques

A

Bilaterally=compress abdomen and flex vertebral column
Unilaterally= laterally flex vertebral column (lumbar) and rotate vertebral column

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11
Q

Internal obliques

A

Bilaterally=compress abdomen and flex vertebral column
Unilaterally= laterally flex vertebral column and rotate vertebral column

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12
Q

Transverse abdomininus

A

I=xiphoid process, pubis and linea alba
A=compresses abdomen

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13
Q

Diaphragm

A

Contraction-flatten diaphragm and increase vertical dimension of thoracic cavity=inhalation
Relaxation=rises superiorly and decreases vertical dimension of thoracic cavity=exhalation

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14
Q

External intercostal

A

Runs obliquely, anterior and inferior from rib above to rib below
Contraction elevates ribs and increases anterioposterior and lateral dimension of thoracic cavity=inhalation
Relaxes depresses ribs and decreases anterioposterior and lateral dimension of thoracic cavity=exhalation

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15
Q

Internal intercostal

A

Run at right angle to external, posterior and inferior from inferior border of rib above to superior border of rib below
Contracts and draws ribs together decreasing anteroposterior and lateral dimension of thoracic cavity during forced exhalation

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16
Q

Pectoralis minor

A

Abduct scapula and rotate downward
Rma=elevates ribs 3-5 during forced inhalation when scapula is fixed

17
Q

Serratus anterior

A

O=ribs 1-8/1-9
I=vertebral border and inferior angle of scapula
A=abducts scapula and rotates upward
Rma=elevates ribs when scapula is stabilized, boxer muscle

18
Q

Trapezius

A

O=superior nuchal line of occipital, ligamentum nuchae and spines of c7-t12
I=clavicle, acromion and spines of scapula
A=superior fibers rotate scapula upward
Middle fibre depress and rotate upward
Inferior and superior rotate upward and stabilize
Rma=superior fibers assist in extension of head

19
Q

Levator scapulae

A

O=transverse processes of c1-c4
I=superior vertebral border of scapula
A=elevated and rotates scapula downward

20
Q

Rhomboid major

A

Elevate and adducts scapula, rotates it downward and stabilizes scapula

21
Q

Pectoralis Major

A

O=clavicle (clavicular head)
Sternum and costal cartilage of ribs 2-6/1-7
I=greater tubercle and lateral lip of intertubercular sulcus of humerus
A= bilaterally adduct and medically rotate arm at should joint
Clavicular head flexes arm
Sternocostal head extends flexed arm to side of trunk

22
Q

Latissimus dorsi

A

Extend, adduct and medially rotate arm at shoulder joint
Draw arm posteriorly and inferiorly
Rma=elevate torso and vertebral column

23
Q

Deltoid

A

O=acromial extremity of clavicle (anterior fibre)
Acromion of scapula (lateral)
Spines of scapula (posterior)
I=deltoid tuberosity of humerus
A=lateral fibers abduct arm
Anterior flexes and medially rotates arm
Posterior extends and laterally rotates

24
Q

Subscapularis

A

Medially rotates arm at shoulder joint

25
Q

Supraspinatus

A

O=supraspinous fossa of scapula
I=greater tubercle of humerus
A=assists deltoid in abduction of arm at shoulder joint

26
Q

Infraspinatus

A

Laterally rotates arm at shoulder joint

27
Q

Teres major

A

Extends arm and assists in adduction and medially rotating the arm at shoulder joint

28
Q

Teres minor

A

Laterally rotates and extend arm

Unit 3 (5 decks)

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