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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

21
Q

Run deep to the trapezius and rhomboids

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
Iliocostalis lumborum
• 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
Ilicostalis thoracis
• 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
Iliocostalis cervicis
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
Longissimus thoracis
• 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
Longissimus cervicics
• 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
Longissimus capitis
• 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
Spinalis thoracis
• 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
Spinalis cervicis
• 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
Spinalis capitis
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
Transversospinales muscle group
Semispinalis, Multifidus, Rotatores
35
Semispinalis thoracis
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
Semispinalis cervicis
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
Semispinalis capitis
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
Multifidus
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
Multifidus
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
Rotarores short and long
• 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
Levator costorum
• O&I: Transverse process to rib below • Brevis: 1 TP above • Longus: 2 TPs above Action- elevate rib
42
Interspinalis
• O&I: Between Spinous Processes • Action: Extension
43
Intertransversarii
• O&I: Between Transverse Processes • Action: Side bending

Anatomy (16 decks)

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