Muscles (Thorax & Back) Flashcards Preview

Anatomy > Muscles (Thorax & Back) > Flashcards

Flashcards in Muscles (Thorax & Back) Deck (20):
1

Pectoralis Major origin, insertion, innervation, actions

 

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2

Pectoralis minor

origin, insertion, innervation, actions

 

 

 

Axillary artery branches- superior thoracic, thoracoacromial, lateral thoracic (screw the lawyers)

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3

Serratus Anterior origin, insertion, innervation, actions

 

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4

Subclavius

origin, insertion, innervation, actions

 

 

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5

External, Internal, and innermost intercostals

origin, insertion, innervation, actions

 

 

 

External-forced inspiration,
 Internal- forced expiration,
Innermost- deepest, elevates ribs

Ext & Innermost don't go all the way to sternum, Internal does. None go all the way to vertebrae

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6

Transversus thoracis origin, insertion, innervation, actions

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7

Rhomboid major & minor origin, insertion, innervation, actions

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8

Levator Scapulae origin, insertion, innervation, actions

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9

Latissimus Dorsi origin, insertion, innervation, actions

Triangle of auscultation- trapezius, latissimus dorsi, medial border of scapula

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10

Serratus posterior (sup & inf) origin, insertion, innervation, actions

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11

True/False: Extrinsic back muscles (trap, lat, levator, rhomboids, serratus post) are true back muscles.

False, not innervated by dorsal rami

12

Trapezius origin, insertion, innervation, actions

Ligamentum nuchae/Nuchal ligament extends from external occipital protuberance to spinous process of C7. Trapezius attaches superiorly to ligamentum nuchae.

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13

Splenius capitis & cervicis origin, insertion, innervation, actions

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14

Erector spinae origin, insertion, innervation, actions

I Love Spaghetti (iliocostalis, longissimus, spinalis). Innervated by dorsal rami.

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15

What does transversospinalis consist of?

Multifidus (most developed in lumbar region)
Rotatores (brevis spans 1 vertebra, longus spans 2 vertebrae, most developed in thoracic region)

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16

Semispinalis (capitis)

origin, insertion, innervation, actions

 

 

Deep to the splenius muscle

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17

Levatores costarum origin, insertion, innervation, actions

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18

Suboccipital triangle

origin, insertion, innervation, actions

 

rectus capitis major & minor, obliquus capitis superior & inferior innervated by suboccipital nerve C1 (motor only)

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19

Sternocleidomastoid origin, insertion, innervation, actions

Innervated by accessory nerve XI. assists in forced inspiration.

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20

Deltoid

origin, insertion, innervation, actions

 

 

 

Innervated by axillary nerve.

Actions: Flexion, Extension at shoulder, abduction

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