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Year 1 - BRS > Back muscles > Flashcards

Back muscles Flashcards

1
Q

What is the origin of the trapezius muscle?

A

Skull, ligamentum nuchae and the spinous processes of C7-T12

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2
Q

What is the insertion of the trapezius muscle?

A

Clavicle, acromion and the spine of the scapula

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3
Q

What is the innervation of the trapezius muscle?

A

Accessory nerve

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4
Q

What is the action of the trapezius muscle?

A

Elevation, rotation, retraction and depression of the scapula

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5
Q

What is the origin of the latissimus dorsi?

A

Spinous processes of T6-T12, thoracolumbar fascia, iliac crest, and the inferior three ribs

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6
Q

What is the insertion of the latissimus dorsi?

A

Fibres converge into a tendon that attaches to the intertubercular sulcus of the humerus

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7
Q

What is the innervation of the latissimus dorsi?

A

Thoracodorsal nerve

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8
Q

What is the action of the latissimus dorsi?

A

Extension, adduction and medial rotation of the upper limb

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9
Q

What is the origin of the levator scapulae?

A

Transverse processes of the C1-C4 vertebrae

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10
Q

What is the insertion of the levator scapulae?

A

Medial border of the scapula

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11
Q

What is the innervation of the levator scapulae?

A

Dorsal scapular nerve

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12
Q

What is the action of the levator scapulae?

A

Elevation of the scapula

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13
Q

What is the origin of the rhomboid major?

A

Spinous processes of T2-T5 vertebrae

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14
Q

What is the insertion of the rhomboid major?

A

Medial border of the scapula, between the scapula spine and inferior angle

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15
Q

What is the innervation of the rhomboid major?

A

Dorsal scapular nerve

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16
Q

What is the action of the rhomboid major?

A

Retracts and rotates the scapula

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17
Q

What is the origin of the rhomboid minor?

A

Spinous processes of C7-T1 vertebrae

18
Q

What is the insertion of the rhomboid minor?

A

Medial border of the scapula, at the level of the spine of scapula

19
Q

What is the innervation of the rhomboid minor?

A

Dorsal scapular nerve

20
Q

What is the action of the rhomboid minor?

A

Retracts and rotates the scapula

21
Q

What muscles make up the spinotransversales (deep muscles)?

A
  • splenius capitis
  • splenius cervicis (colli)
22
Q

What is the origin of the splenius capitis?

A

Lower aspect of the ligamentum nuchae, and the spinous processes of C7-T3/4 vertebrae

23
Q

What is the insertion of the splenius capitis?

A

Mastoid process and the occipital bone

24
Q

What is the action of the splenius capitis?

A

Rotate head to same side

25
Q

What is the innervation of the splenius capitis?

A

Posterior rami of spinal nerves C3 and C4

26
Q

What is the origin of the splenius cervicis?

A

Spinous processes of T3-T6 vertebrae

27
Q

What is the insertion of the splenius cervicis?

A

Transverse processes of C1-3/4

28
Q

What is the action of the splenius cervicis?

A

Rotate head to same side

29
Q

What is the innervation of the splenius cervicis?

A

Posterior rami of the lower cervical spinal nerves

30
Q

What muscles make up the erector spinae? (Deep muscles)

A
  • iliocostalis
  • longissimus
  • spinalis
31
Q

What is the origin of the iliocostalis?

A

Common tendinous origin of the erector spinae

32
Q

What is the insertion of the iliocostalis?

A

Costal angle of the ribs and the cervical transverse processes

33
Q

What is the action of the iliocostalis?

A
  • unilaterally laterally flex the vertebral column
  • bilaterally extend the vertebral column and head
34
Q

What is the innervation of the iliocostalis?

A

Posterior rami of the spinal nerves

35
Q

What is the origin of the longissimus?

A

Common tendinous origin of the erector spinae

36
Q

What is the insertion of the longissimus?

A

Lower ribs, the transverse processes of C2-T12, and the mastoid process of the skull

37
Q

What is the action of the longissimus?

A
  • unilaterally laterally flex the vertebral column
  • bilaterally extend the vertebral column and head
38
Q

What is the innervation of the longissimus?

A

Posterior rami of the spinal nerves

39
Q

What is the origin of the spinalis?

A

Common tendinous origin of the erector spinae

40
Q

What is the insertion of the spinalis?

A

Spinous processes of C2, T1-T8 and the occipital bone of the skull

41
Q

What is the action of the spinalis?

A
  • unilaterally laterally flex the vertebral column
  • bilaterally extend the vertebral column and head
42
Q

What is the innervation of the spinalis?

A

Posterior rami of the spinal nerves

Year 1 - BRS (73 decks)

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