Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

CHI282 - Human Anatomy 2 > Lecture 11-intrinsic Back Muscles > Flashcards

Lecture 11-intrinsic Back Muscles Flashcards

0
Q

In the standing position, most of the body’s weight falls in …… of the vertebral column.

A

front

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
1
Q

Intrinsic back muscles

Muscles concerned with ……. ….. ……. ……. and maintenance of ………

A

movements of the spine

posture

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Intrinsic back muscles
•Deep back muscles
•Back muscles “proper”
•Maintain posture and control movements of vertebral column.
•Innervated by …… …… of spinal nerves.

A

posterior rami

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Posterior rami of …. ….. …. … …. supply deep muscles of the back but DO NOT supply the ….. of the back.

A

C1, C7, C8, L4 & L5

skin

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Intrinsic back muscles

•Superficial layer: …….. …… And …… …….

A

splenius capitis, splenius cervicis.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Intrinsic back muscles

•Intermediate layer: ……… …… Which is made up of which three muscles

A

erector spinae (iliocostalis, longissimus, spinalis)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Intrinsic back muscles

•Deep layer: ……………..which is made up of which three muscles

A

transversospinalis (semispinalis, multifidus, rotatores)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Superficial layer:
Splenius muscles
•Thick, flat, …………… surface of neck
•“Splenion” = Latin for ………..
•Cover and hold deep neck muscles in position

  • Splenius cervicis
  • Splenius capitis
A

posterolateral

bandage

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Splenius cervicis

Proximal Attachment:

A

SPs of T3-T6

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q 
Splenius cervicis
Distal attachment (insertion)
A

Transverse processes

of C1-C3 vertebrae

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Splenius cervicis

Innervation

A

Posterior rami of lower cervical spinal nerves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Splenius cervicis

Main action

A

Unilaterally: laterally flexes and rotates neck to same side
Bilaterally: extends neck

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Splenius Capitis

Proximal Attachment:

A

Nuchal ligament, SPs of C7-T3

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q 
Splenius Capitis
Distal attachment (insertion)
A

Mastoid process of temporal bone and lateral third of superior nuchal line

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Splenius Capitis

Innervation

A

Posterior rami of middle cervical spinal nerves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Splenius Capitis

Main action

A

Unilaterally: laterally flexes neck and rotates head to same side

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Intermediate layer:
Erector spinae muscles
•Located between the …….. ……… medially and …….. ……. laterally.
•Chief ……… of the vertebral column.

  • Iliocostalis (most lateral)
  • Longissimus (intermediate)
  • Spinalis (medial)
A

extensors
spinous processes
rib angles

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Iliocostalis

Proximal Attachment:

A

Posterior sacrum
iliac crest
SPs of lower lumbar and sacral vertebrae

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Iliocostalis

Distal attachment

A

Angles of lower ribs

cervical transverse processes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Iliocostalis

Innervation

A

Posterior rami of spinal nerves

20
Q

Iliocostalis

Main action

A

Unilaterally:
Laterally flex vertebral column

Bilaterally:
extends vertebral column and head

21
Q

Longissimus

Proximal Attachment:

A

Posterior sacrum
iliac crest
SPs of lower lumbar and sacral vertebrae

22
Q

Longissimus

Distal attachment

A

Between tubercles and angles of ribs
tranverse processes of thoracic and cervical vertebrae
mastoid process

23
Q

Longissimus

Innervation

A

Posterior rami of spinal nerves

24
Q

Longissimus

Main action

A

Unilaterally:
Laterally flex vertebral column

Bilaterally:
extends vertebral column and head

25
Q

Spinalis

Proximal Attachment:

A

Posterior sacrum
iliac crest
SPs of lower lumbar and sacral vertebrae

26
Q

Spinalis

Distal attachment

A

Spinous processes of upper thoracic and midcervical vertebrae, and cranium

27
Q

Spinalis

Innervation

A

Posterior rami of spinal nerves

28
Q

Spinalis

Main action

A

Unilaterally: Laterally flex vertebral column

Bilaterally: extends vertebral column and head

29
Q

Deep layer:

Transversospinales includes which three muscles

A
  • Semispinalis
  • Multifidus
  • Rotatores
30
Q

Semispinalis

Proximal Attachment:

A

TPs of C4-T12

31
Q

Semispinalis

Distal attachment

A

Spinous processes of cervical and thoracic vertebrae

32
Q

Semispinalis

Innervation

A

Posterior rami of spinal nerves

33
Q

Semispinalis

Main action

A

Extends head, neck and thorax and rotates them to opposite side

34
Q

Multifidus

Proximal Attachment:

A 
Posterior Sacrum,
Ilium 
TPs of T1-T12
articular processes of C4-C7
PSIS
SI ligaments
Mammillary processes of lumbar vertebrae
35
Q

Multifidus

Distal attachment

A

Spinous processes of vertebrae above, spanning 2-4 segments

36
Q

Multifidus

Innervation

A

Posterior rami of spinal nerves

37
Q

Multifidus

Main action

A

Stabilises spine during local movements.

Pain/proprioception.

38
Q

Rotatores

Proximal Attchment:

A

TPs best in thoracic region

39
Q

Rotatores

Distal attachment

A

Lamina and transverse processes or spine above, spanning 1 or 2 segments

40
Q

Rotatores

Innervation

A

Posterior rami of spinal nerves

41
Q

Rotatores

Main action

A

Stabilise
extend
rotate spine.
Proprioception.

42
Q

Electromyographic study of the back muscles => increased activity during the first stage of anterior flexion but …………. as extreme flexed position approached

A

decreases

43
Q
  • Extreme flexed position =>back muscles …….., ligaments take over stabilising role.
  • This explains the danger of heavy lifting while the trunk is in extreme flexed position.
A

relaxed

44
Q

What muscles comprise the superficial layer of intrinsic back muscles?

A

Splenius capitis, splenius cervicis.

45
Q

What region of the spine are rotatores best developed?

A

Thoracic

46
Q

What regions of the spine does semispinalis traverse?

A

Cervical and thoracic

47
Q

What is the largest muscle crossing the sacroiliac joint?

A

Multifidus

48
Q

Do posterior rami of L1, L2 & L3 innervate muscle and skin of the back?

A

YES

CHI282 - Human Anatomy 2 (16 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions