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Exam 1 gross > Intrinsic Back Muscles, Superficial & Intermediate > Flashcards

Intrinsic Back Muscles, Superficial & Intermediate Flashcards

1
Q

Superficial intrinsic back muscles?

A

Serratus posterior, splenius

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2
Q

Intermediate intrinsic back muscles? (3)

A

Iliocostalis, Longissimus, Spinalis

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3
Q

Origin of the Serratus posterior superior?

A

Nuchal ligament; spinous process of C7-T3

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4
Q

Insertion of Serratus posterior superior?

A

2nd-4th ribs (superior borders)

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4
Q

Innervation of Serratus posterior superior?

A

Spinal nn. T2-T5 (anterior rami)

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5
Q

Action of Serratus posterior superior?

A

Elevates ribs

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6
Q

Origin of Serratus posterior inferior?

A

Spinous process of T11-L2

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7
Q

Insertion of Serratus Posterior Inferior?

A

8th-12th ribs (inferior borders, near angles)

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8
Q

Innervation of Serratus posterior inferior?

A

Spinal nn. T9-T12 (anterior rami)

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9
Q

Action of Serratus Posterior Inferior?

A

Depresses ribs

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10
Q

Origin of Splenius capitis?

A

Nuchal ligament; spinous process of C3-C7

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11
Q

Insertion of Splenius Capitis?

A

Occipital bone (lateral superior nuchal line; mastoid process)

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12
Q

Innervation of Splenius Capitis?

A

SPinal nn. C1-C6 (posterior rami, lateral branches)

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13
Q

Action of Splenius Capitis?

A

Bilaterial: extends cervical spine and head
Unilateral: flexes and rotates head to the same side

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14
Q

Origin of SPlenius cervicis?

A

SPinous processes of T3-T6

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15
Q

Insertion of Splenius cervicis?

A

Transverse process of C1-C2

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16
Q

Innervation of splenius cervicis?

A

Spinal nn. C1-C6 (posterior rami, lateral branches)

17
Q

Action of splenius cervicis?

A

Bilateral: extends cervical spine and head
Unilateral: flexes and rotates head to the same side

18
Q

Origin of iliocostalis cervicis?

A

3rd-7th ribs

19
Q

Insertion of Iliocostalis cervicis?

A

C4-C6 (transverse processes)

20
Q

Innervation of entire Iliocostalis muscle?

A

Spinal nn. C8-L1 (posterior rami, laterial branches)

21
Q

Action of Iliocostalis?

A

Bilateral: extends spine
Unilateral: bends spine laterally to same side

22
Q

Origin of Iliocostalis thoracis?

A

7th-12th ribs

23
Q

Insertion for iliocostalis thoracis?

A

1st-6th ribs

24
Q

Origin of Iliocostalis lumborum?

A

Sacrum; iliac crest; thoracolumbar fascia

25
Q

Insertion of Iliocostalis lumborum?

A

6th-12th ribs; thoracolumbar fascia (deep layer); upper lumbar vertebrae

26
Q

Origin of the longissimus capitis?

A

T1-T3 (transverse processes)

C4-C7 (transverse and articular processes)

27
Q

Insertion of longissimus capitis?

A

Temporal bone (mastoid process)

28
Q

Action of the Longissimus capitis?

A

Bilateral: extends head
Unilateral: flexes and rotates head to the same side

29
Q

Origin of longissimus cervicis?

A

T1-T6 (transverse processes)

30
Q

Insertion of longissimus cervicis?

A

C2-C5 (transverse processes)

31
Q

Origin of longissimus thoracis?

A

Sacrum; iliac crest; lumbar vertebrae (spinous processes); lower thoracic vertebrae (transverse processes)

32
Q

Innervation of Longissimus?

A

Spinal nn. C1-L5 (posterior rami, lateral branches)

33
Q

Action of longissimus cervicis and thoracis?

A

Bilateral: extends spine
Unilateral: bends spine laterally to same side

34
Q

Origin of spinalis cervicis?

A

C5-T2 (spinous process)

35
Q

Insertion of spinalis cervicis?

A

C2-C5 (spinous processes)

36
Q

Origin of spinalis thoracis?

A

T10-L3 (spinous processes, lateral surfaces)

37
Q

Insertion of Spinalis thoracis?

A

T2-T8 (spinous processes, lateral surfaces)

38
Q

Innervation of spinalis muscle?

A

Spinal nn. (posterior rami)

39
Q

Action of spinalis muscle?

A

Bilateral: extends cervical and thoracic spine
Unilateral: bends cervical and thoracic spine to same side

Exam 1 gross (14 decks)

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