Practical Muscles Flashcards

1
Q

Anterior Digastric Origin

A

Digastric fossa of mandible

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2
Q

Posterior Digastric Origin

A

Mastoid notch of temporal bone

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3
Q

Anterior and Posterior Digastric insertion

A

Intermediate tendon to body and greater or of hyoid

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4
Q

Anterior and Posterior Digastric Action

A

With the infrahyoid muscles depresses mandible against resistance; and elevates and steadies hyoid during speaking and swallowing

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5
Q

Posterior Scalene Origin

A

Posterior tubercles of transverse processes of C5-C7 vertebrae

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6
Q

Posterior scalene insertion

A

External border of 2nd rib

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7
Q

Posterior scalene action

A

unilaterally flexes neck laterally to same side; bilaterally elevates 2nd rib during forced inspiration, and flexes cervical spine

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8
Q

Middle Scalene Origin

A

Posterior tubercles of transverse processes of C5-C7 vertebrae

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9
Q

Middle Scalene Insertion

A

Superior surface of 1st rib; posterior to groove for subclavian artery

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10
Q

Middle Scalene Action

A

Unilaterally flexes neck to same side; bilaterally elevates 1st rib during forced inspiration and flexes cervical spine

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11
Q

Anterior Scalene Origin

A

Transverse processes of C3-C6 vertebrae

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12
Q

Anterior Scalene Insertion

A

1st rib

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13
Q

Anterior Scalene Action

A

bilaterally flexes cervical spine; unilaterally laterally flexes cervical spine

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14
Q

Splenius Cervicis origin

A

Nuchal ligament and spinous processes of C7-T3 or T4 vertebrae

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15
Q

Splenius Cervicis Insertion

A

Tubercles of transverse processes of C1-C3 or C4 vertebrae

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16
Q

Splenius Cervicis Action

A

Unilaterally laterally flex neck and rotate head to same side; bilaterally extend head and neck

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17
Q

Longus Capitis Origin

A

Basilar part of occipital bone

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18
Q

Longus Capitis Insertion

A

Anterior tubercles of C3-C6 transverse processes

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19
Q

Longus Capitis Action

A

Unilaterally laterally flexes cervical spine to same side; bilaterally flexes cervical spine

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20
Q

Temporalis Origin

A

floor of temporal fossa and deep surface of temporal fascia

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21
Q

Temporalis Insertion

A

tip and medial surface of coronoid process and anterior border of ramus of mandible

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22
Q

Temporalis Action

A

Elevates mandible; posterior, more horizontal fibers are primary retractors of mandible

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23
Q

Masseter Origin

A

inferior border and medial surface of maxillary process of zygomatic arch

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24
Q

Masseter insertion

A

Angle and lateral surface of ramus of mandible

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25
Masseter Action
Elevates mandible, closing jaws; superficial fibers make limited contribution to protrusion of mandible
26
Medial Pterygoid Origin
medial surface of lateral pterygoid plate and pyramidal process of palatine bone and tuberosity of maxilla
27
Medial Pterygoid Insertion
Medial surface of ramus of mandible, inferior to mandibular foramen
28
Medial Pterygoid Action
Acts synergistically with masseter to elevate mandible; contributes to protrusion; alternate unilateral activity produces smaller grinding movements
29
Lateral Pterygoid Origin
infratemporal surface and crest of greater wing of sphenoid and lateral surface of lateral pterygoid plate
30
Lateral Pterygoid Insertion
Joint capsule and articular disc of TMJ; pterygoid fovea on condyloid process of mandible
31
Lateral Pterygoid Action
Acting bilaterally, protracts mandible and depresses chin; acting unilaterally, swings jaw toward contralateral side
32
SCM sternal head origin
Anterior surface of manubrium of sternum
33
SCM Clavicular head origin
superior surface of medial third of clavicle
34
SCM Insertion
mastoid process of temporal bone and lateral half of superior nuchal line
35
SCM action
Unilaterally laterally flexes the neck ipsilaterally, and rotates the neck contralaterally; Bilaterally extends head at atlanto-occipital joint, flexes cervical vertebrae, and protrudes head
36
Rectus Capitis Posterior Major origin
Spinous process of vertebra C2
37
Rectus Capitis Posterior Major insertion
Lateral part of inferior nuchal line of occipital bone
38
Rectus Capitis Posterior Major action
Unilaterally rotates head to same side; bilaterally extends the head
39
External intercostal muscle origin
inferior border of ribs (fiber orientation inferomedial)
40
External intercostal muscle insertion
Superior border of ribs below
41
External intercostal muscle action
Elevation of the ribcage during inhalation
42
Internal intercostal muscle origin
Upper border of rib below (fibers run superomedially)
43
Internal intercostal muscle insertion
lower border of rib above
44
Internal intercostal muscle action
Depresses ribs
45
Longissimus cervicis origin
Transverse processes of T1-T5
46
Longissimus cervicis insertion
Transverse processes of C2-C6
47
Longissimus Cervicis action
unilaterally side bends neck to same side; bilaterally extends the neck
48
Longus Colli origin
Anterior tubercle of C1 vertebra (atlas); bodies of C1-C3 and transverse processes of C3-C6 vertebrae
49
Longus Colli Insertion
Bodies of C5-T3 vertebrae; transverse processes of C3-C5 vertebrae
50
Longus Colli action
unilaterally flexes neck with rotation (torsion) to opposite side; Bilaterally neck flexion
51
Rectus capitis Posterior minor origin
Posterior tubercle of posterior arch of vertebra C1
52
Rectus capitis posterior minor insertion
Medial part of inferior nuchal line of occipital bone
53
Rectus capitis posterior minor action
Unilaterally rotates head to same side; bilaterally extends head
54
Upper trapezius origin
inferior nuchal line of external occipital proterbuerance , medial third of superior nuchal line and spinous process of C7 (whole muscle= spinous process of C7-T12)
55
Upper Trapezius insertion
lateral 3rd of clavicle, acromion and spine of scapula
56
Upper trapezius action
elevation and upward rotation of the scapula
57
Splenius Capitis origin
Nuchal ligament and spinous processes of C7-T3 or T4 vertebrae
58
Splenius Capitis insertion
Fibers run superolaterally to mastoid process of temporal bone and lateral third of superior nuchal line of occipital bone
59
Splenius capitis action
unilaterally laterally flex and rotate head and neck to same side; bilaterally extend head and neck
60
Longissimus capitis origin
Transverse processes of T1-T5 & transverse processes of C4-C6/C7
61
Obliquus capitis inferior origin
Posterior tubercle of posterior arch of vertebra C2
62
Obliquus capitis inferior insertion
Transverse process of vertebra C1
63
obliquus capitis inferior action
unilaterally rotates head to the same side; bilaterally extends the head
64
Levator Scapulae origin
Posterior tubercles of transverse processes of C1-C4 vertebrae
65
Levator Scapulae insertion
medial border of scapula superior to the root of scapular spine
66
Levator scapulae action
Elevates scapula and tilts its glenoid inferiorly by rotating scapula
67
Obliquus capitis superior origin
Transverse process of vertebra C1
68
Obliquus capitis superior insertion
Occipital bone between superior and inferior nuchal lines
69
obliquus capitis superior action
unilaterally laterally flexes head to same side; bilaterally extends head
70
Semipinalis capitis origin
transverse processes of C7-T6 & articular processes of C4-C6
71
Semispinalis Capitis insertion
Between superior and inferior nuchal lines of occipital bone
72
Semispinalis capitis action
unilaterally rotates head and neck to opposite side; bilaterally extends head and neck