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Anatomy > Trunk Muscles > Flashcards

Trunk Muscles Flashcards

1
Q

Trapezius

A

Origin: occipital protuberance, ligamentum nuchae, spinous process

Insertion: spine of scapula, acromion, clavicle

Motions: rotational component
Upper fibers- Elevation, rotational elevation
middle fibers: retraction, stabilize scapula
Lower fibers- Depression, rotational elevation

Nerve: Accessory

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2
Q

Latissimus Dorsi

A

Origin: inferior angle of scapula, spinous process of last 6 thoracic vertebrae, last 3 or 4 ribs, thoracolumbar aponeurosis and posterior iliac crest

Insertion: intertubercular groove of the humerus

Motions: adduction(prime mover), extension, medial rotation

Nerve: Thoracodorsal nerve

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3
Q

Rhomboid Minor

A

Origin: spinous process c7-t1

Insertion:upper portion of medial border of scapula

Motions: Elevation, retraction, rotational depression

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4
Q

Rhomboid major

A

Origin: spinous process of T2-T5

Insertion: medial border of scapula

Motions: Elevation, retraction, rotational depression

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5
Q

Levator Scapula

A

Origin: upper cervical vertebrae

Insertion: medial border of scapula

Motions: Elevation, rotational depression

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6
Q

Deltoid

A

Origin: Parts of outer clavicle

Insertion: Deltoid tuberosity

Motions:
All fibers: abduction (prime mover)
Anterior fibers: Flexion
Posterior fibers: Extension, external rotation

Nerve: Axillary nerve

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7
Q

Serratus Posterior Superior

A

Action:
Elevate Ribs during Inhalation

Nerve:
T1, 2, 3, 4

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8
Q

Serratus Posterior Inferior

A

Action:
Depress Ribs during Exhalation

Nerve:
T9, 10, 11, (12)

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9
Q

Splenius Capitis

A

Action:
Unilaterally:
Rotate Head/Neck to Same Side
Laterally Flex Head/Neck to Same Side

Bilaterally:
Extend Head/Neck

Nerve:
Cervical Nerve

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10
Q

Splenius Cervicis

A

Action:
Unilaterally:
Rotate Head/Neck to Same Side
Laterally Flex Head/Neck to Same Side

Bilaterally:
Extend Head/Neck

Nerve:
Cervical Nerve

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11
Q

Erector Spinae- iliocostalis

A

Action:
Unilaterally:
Laterally Flex Vertebral Column to Same Side

Bilaterally:
Extend Vertebral Column

Nerve:
Spinal

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12
Q

Erector Spinae- Longissimus

A

Action:
Unilaterally:
Laterally Flex Vertebral Column to Same Side

Bilaterally:
Extend Vertebral Column

Nerve:
Spinal

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13
Q

Erector Spinae- Spinalis

A

Action:
Unilaterally:
Laterally Flex Vertebral Column to Same Side

Bilaterally:
Extend Vertebral Column

Nerve:
Spinal Nerve

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14
Q

Multifidi

A

Action:
Unilaterally:
Rotate Vertebral Column to Opposite Side

Bilaterally:
Extend Vertebral Column

Nerve:
Spinal Nerve

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15
Q

Rotators

A

Action:
Unilaterally:
Rotate Vertebral Column to Opposite Side

Bilaterally:
Extend Vertebral Column

Nerve:
Spinal Nerve

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16
Q

Interspinalis

A

Action:
Extend Vertebral Column

Nerve:
Spinal Nerve

17
Q

Intertransversarii

A

Action:
Unilaterally:
Laterally Flex Vertebral Column to Same Side

Bilaterally:
Extend Vertebral Column

Nerve:
Spinal Nerve

18
Q

Levator Costalis (Costarum?)

A

Action:
Elevate ribs for deep inspiration

Nerve:
dorsal rami

19
Q

External Oblique

A

Action:
Unilaterally:
Laterally Flex Vertebral Column to Same Side
(Right Side: Lumbar Lateral Flexion to Right)
(Left Side: Lumbar Lateral Flexion to Left)

Rotate Vertebral Column to Opposite Side
(Right Side:Rotation to Left)
(Left Side: Rotation to Right)

Bilaterally:
Flex the Vertebral Column
Compress Abdominal Contents

Nerve: (T5,6) t7-11, T12
Iliohypogastric and Ilioinguinal
Ventral primary rami

20
Q

Internal Oblique

A

Action:
Unilaterally:
Laterally Flex Vertebral Column to Same Side
(Right Side: Lumbar Lateral Flexion to Right)
(Left Side: Lumbar Lateral Flexion to Left)

Rotate Vertebral Column to Same Side
(Right Side:Rotation to Right)
(Left Side: Rotation to Left)

Bilaterally:
Flex the Vertebral Column
Compress Abdominal Contents

Nerve: T7,8, T9-12, L1
Iliohypogastric and Ilioinguinal
Ventral primary rami

21
Q

Rectus Abdominis

A

Action:
Unilaterally:
Laterally Flex Vertebral Column to Same Side
(Right Side: Lumbar Lateral Flexion to Right)
(Left Side: Lumbar Lateral Flexion to Left)

Bilaterally:
Flex the Vertebral Column
Tilt Pelvis Posteriorly

Nerve: T5, T7-11, T12, ventral rami

22
Q

Transverse Abdominis

A

Action:
Forced expiration by pulling the abdominal wall inward
(Compress Abdominal Contents)

Nerve: T7-12, L1
Iliohypogastric and Ilioinguinal
Ventral divisions

23
Q

Internal Intercostals

A

Action:
Draw Ribs Inferiorly to Assist with Exhalation
(Decreases Space of Thoracic Cavity)

Nerve:
Thoracic Nerve

24
Q

External Intercostals

A

Action:
Draw Ribs Superiorly to Assist with Inhalation
(Increases Space of Thoracic Cavity)

Nerve:
Thoracic Nerve

25
Q

Quadratus Lumborum

A

Unilaterally:
Laterally Tilt(Elevate) Pelvis
Laterally Flex Vertebral Column to Same Side
Extend Vertebral Column(Assist)

Bilaterally:
Fix Last Rib During Forced Inhalation and Exhalation
Stabilize Pelvis and Lumbar Spine

Nerve:
Lumbar Plexus Nerve

Anatomy (26 decks)

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