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Anatomy > Muscles > Flashcards

Muscles Flashcards

1
Q

Control limb movement

A

Superficial extrinsic

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2
Q

Muscles that are extrinsic

A

Trapezius, latissimus dorsi, levator scapulae, rhomboids

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3
Q

Classified as posterior axioappendicular muscles that connect the axial skeleton
to the pectoral girdle and humerus.

A

Superficial extrinsic

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4
Q

Control respiratory movements

A

Intermediate extrinsic

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5
Q

Intermediate extrinsic

A

Serratus posterior superior and inferior

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6
Q

deep back and back proper

A

Intrinsic

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7
Q

Deep muscles (superficial layer)

A

Splenius muscles
• Splenius capitis
• Splenius cervicis

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8
Q

Deep muscles (intermediate layer)

A

Erector spinae muscles • Iliocostalis, Longissimus, Spinalis

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9
Q

Deep layer

A

Transversospinales muscle group
• Semispinalis, Multifidus, Rotatores • Deep Minor layer- Interspinalis, Intertransversarii, levator costarum

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10
Q

Trapezius

A

• Origin: Greater external occipital
protuberance, Superior nuchal line, Nuchal ligament, and Spinous processes of C7-T12
• Insertion: Lateral third of clavicle and
Spine of the scapula
• Innervation: Spinal accessory nerve

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11
Q

Action of the upper trapezius

A

Elevation and upward rotation of scapula

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12
Q

Action of the middle trapezius

A

Retraction of the scapula

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13
Q

Action of the Lower trapezius

A

Depression and upward
rotation of the scapula

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14
Q

Latissimus dorsi

A

Origin: Thoracolumbar fascia
• Insertion: Intertubercular groove(sulcus) of
the humerus
• Innervation: Thoracodorsal Nerve
(C6,C7,C8)
• Action: Adduction, Extension, and Internal
rotation of the humerus
• Blood supply: Thoracodorsal artery

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15
Q

Levator scapulae

A

• Origin: Posterior tubercles of the
transverse processes of C1-C4
• Insertion: Medial border and
superior angle of the scapula
• Innervation: Dorsal scapular nerve
(C4-5) and sometimes cervical nerves (C3-4)
• Action: Elevates and downward
rotates the scapula
• Plays role in head posture

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16
Q

Rhomboid major

A

Origin: Spinous process of T2-T5
• Insertion: Medial border of scapula
• Innervation: Dorsal scapular nerve
(C4-C5)
• Action: Retracts and downward
rotates the scapula
• Fixes scapula to thorax • Blood supply: Dorsal Scapular
artery

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17
Q

Rhomboid minor

A

• Origin: Nuchal ligament and Spinous
process of C7-T1
• Insertion: Medial border of scapula • Innervation: Dorsal scapular nerve
(C4-C5)
• Action: Retracts and downward
rotates the scapula
• Fixes scapula to thorax • Blood supply: Dorsal Scapular artery

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18
Q

Serratus posterior superior

A

• Origin: Nuchal ligament and Spinous
process of C7-T3
• Insertion: Superior borders of ribs 2-4
• Innervation: Intercostal nerves T2-T4
• Action: Elevate ribs (Proprioception)

19
Q

Serratus Posterior Inferior

A

• Origin: Spinous process of T11-L2
• Insertion: Inferior borders of ribs 8-12
• Innervation: Thoracic spinal nerves
T9-T12
• Action: Depress ribs (Proprioception)

20
Q

Splenius means

A

Bandage

21
Q

Run deep to the trapezius and rhomboids

A

Splenius

22
Q

Splenius capitis

A

Origin: Nuchal ligament and Spinous
process of C3-T3 • Insertion: Mastoid process of
occipital bone
• Innervation: Dorsal rami of middle
cervical spinal nerves
• Action: Rotation and lateral side
bending (unilaterally)
• Extension (bilaterally)

23
Q

Splenius cervicis

A

Origin: Spinous process of T3-T6
• Insertion: Posterior tubercules of
transvers processes of C1-C4
• Innervation: Dorsal rami of middle
cervical spinal nerves
• Action: Cervical rotation and lateral
side bending (unilaterally)
• Extension (bilaterally)

24
Q

Iliocostalis muscles =

A

Most lateral

25
Q

Iliocostalis lumborum

A

• Origin: Common tendinous origin to
sacrum and posterior iliac crest
• Insertion: Lower border of the rib
angles of 6-12
• Innervation: Posterior rami of spinal
nerves
• Action: Lateral side bending (unilaterally)
• Extension, maintain erect posture,
and stabilization (bilaterally)

26
Q

Ilicostalis thoracis

A

• Origin: Upper border of ribs 6-12 (medial to
lumborum)
• Insertion: Lower border of the rib angles
of 1-6
• Innervation: Posterior rami of spinal
nerves
• Action: Lateral side bending (unilaterally)
• Extension, maintain erect posture,
and stabilization (bilaterally)

27
Q

Iliocostalis cervicis

A

Origin: Upper border of ribs 1-6 (medial to
thoracis)
• Insertion: Transverse process of C4-C6 (we’ll
find in spring)
• Innervation: Posterior rami of spinal
nerves
• Action: Lateral side bending (unilaterally)
• Extension, maintain erect posture, and
stabilization (bilaterally)

28
Q

Longissimus thoracis

A

• Origin: Common tendinous origin to
sacrum and posterior iliac crest • InserWon: Transverse processes of all
thoracic vertebrae, and medial to rib
angles
• InnervaWon: Posterior rami of spinal
nerves
• AcWon: Lateral side bending (unilaterally)
• Extension, maintain erect posture,
and stabilizaWon (bilaterally)

29
Q

Longissimus cervicics

A

• Origin: Transverse process of T1-T5
• Insertion: Transverse processes of all
C2-C6
• Innervation: Posterior rami of spinal
nerves
• Action: Lateral side bending (unilaterally)
• Extension, maintain erect
posture, and stabilization (bilaterally)

30
Q

Longissimus capitis

A

• Origin: Transverse process and articular
processes of lower cervical and upper thoracic vertebrae
• Insertion: Posterior aspect of mastoid
process
• Innervation: Posterior rami of spinal
nerves
• Action: Lateral side bending (unilaterally)
• Extension, maintain erect posture,
and stabilization (bilaterally)

31
Q

Spinalis thoracis

A

• Origin: Common tendinous origin to
sacrum and posterior iliac crest • Insertion: Spinous process of T3-T9
• Innervation: Posterior rami of spinal
nerves
• Action: Lateral side bending (unilaterally)
• Extension, maintain erect posture, and
stabilization (bilaterally)

32
Q

Spinalis cervicis

A

• Origin: Spinous process of C6-T2
• Insertion: Spinous process of C2-C4
• Innervation: Posterior rami of spinal
nerves
• Action: Lateral side bending (unilaterally)
• Extension, maintain erect posture,
and stabilization (bilaterally)

33
Q

Spinalis capitis

A

Origin: Spinous process of lower cervical
and upper thoracic vertebrae
• Insertion: Between superior and inferior
Nuchal lines of the occipital bone (follows WILL FIND the fibers of semispinalis capitis)
• Innervation: Posterior rami of spinal
nerves IN SPRING
• Action: Lateral side bending (unilaterally)
• Extension, maintain erect posture,
and stabilization (bilaterally)

34
Q

Transversospinales muscle group

A

Semispinalis, Multifidus, Rotatores

35
Q

Semispinalis thoracis

A

Origin: Transvers process of T6-T12
• Insertion: Spinous process of upper thoracic
lower cervical vertebrae
• Innervation: Posterior rami of spinal nerves
• Action: Rotation (unilaterally)
• Extension of back and neck (bilaterally)
• Posture

36
Q

Semispinalis cervicis

A

Origin: Transvers process of T1-T6
• InserWon: Spinous process of C2-C5
• InnervaWon: Posterior rami of spinal nerves
• AcWon: RotaWon (unilaterally)
• Extension of back and neck (bilaterally)
• Posture

37
Q

Semispinalis capitis

A

Origin: Transvers process of T1-T6 and
articular process of C4-C7
• Insertion: Between superior and inferior
nuchal lines of occipital bone (on head)
• Innervation: Posterior rami of spinal
nerves •
Action: Rotation (unilaterally)
• Extension of back and neck (bilaterally)
• Posture

38
Q

Multifidus

A

Origin:
• Cervical: Articular processes of lower vertebrae
• Thoracic: Transverse processes of thoracic
vertebrae
• Lumbar: PSIS, deep portion of common
tendinous origin of erector spinae, and Lower
portion of dorsal sacrum
• (This is what we will spend most of our time
seeing in the lab and working on in the clinic)

39
Q

Multifidus

A

Insertion: Spinous processes of L5-C2
• (whole back, but will skip 1-3 segments
based on location)
• Innervation: Posterior rami of spinal
nerves
• Action:
• Bilateral extension •
Controls/stabilizes lateral flexion
eccentrically
• Unilaterally rotates vertebral
bodies

40
Q

Rotarores short and long

A

• Origin: Transvers process of a vertebrae
• Insertion: Inserts on base of spinous
process
• Short: Vertebrae immediately above
• Long: Skips 1 vertebrae
• Action: Rotation (unilaterally)
• Extension of back and neck (bilaterally)
• Posture

41
Q

Levator costorum

A

• O&I: Transverse process to rib below
• Brevis: 1 TP above
• Longus: 2 TPs above
Action- elevate rib

42
Q

Interspinalis

A

• O&I: Between Spinous Processes
• Action: Extension

43
Q

Intertransversarii

A

• O&I: Between Transverse Processes
• Action: Side bending

Anatomy (16 decks)

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