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Anatomy > The Back > Flashcards

The Back Flashcards

1
Q

What are intrinsic back muscles?

A

Also called “true” back muscles, these muscles start and end in the back. They help maintain posture and move the vertebral column.

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2
Q

What are extrinsic back muscles?

A

“Superficial” back muscles that connect the upper extremities to the trunk. They are involved in upper limb movement and respiration.

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3
Q

Name the landmarks of the back.

A

1: Spine of C7
2: Spine of T7 at the inferior angle of scapula
3: Spine of L4 to the iliac crest

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4
Q

Trapezius

A

Extrinsic
Innervation: Spinal Accessory Nerve (CN XI)
Blood Flow: Transverse Cervical Artery
Action: Elevates, retracts and rotates scapula

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5
Q

Levator Scapulae

A

Extrinsic
Innervation: Dorsal Scapular Nerve
Blood Flow: Dorsal Scapular Artery
Action: Elevates scapula medially

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6
Q

Rhomboideus Major

A

Extrinsic
Innervation: Dorsal Scapular Nerve
Blood Flow: Dorsal Scapular Artery
Action: Fixes scapula to thoracic wall and retracts and rotates it to depress glenoid cavity

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7
Q

Rhomboideus Minor

A

Extrinsic
Innervation: Dorsal Scapular Nerve
Blood Flow: Dorsal Scapular Artery
Action: Fixes scapula to thoracic wall and retracts and rotates it to depress glenoid cavity

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8
Q

Serratus Anterior

A 
Not a back muscle
Innervation: Long Thoracic Nerve
Blood Flow: Lateral Thoracic Artery
Action: Protracts and rotates scapula and  holds it against thoracic wall
-> Injury causes "winged scapula"
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9
Q

Serratus Posterior Superior

A

Intrinsic
Innervation: Ventral rami of upper thoracic nerves
Blood Flow: Posterior Intercostal arteries
Action: Elevates ribs

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10
Q

Serratus Posterior Inferior

A

Intrinsic
Innervation: Ventral rami of lower thoracic nerves
Blood Flow: Posterior Intercostal arteries
Action: Depresses ribs

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11
Q

Erector Spinae

A

Intrinsic
Innervation: Dorsal rami of each region
Blood Flow: Extended network throughout the spine
Action: Extends and laterally bends vertebral column and head

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12
Q

Splenius Capitis

A

Innervation: Dorsal rami of cervical nerves
Blood Flow: Descending branch of occipital artery
Action: Extends head

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13
Q

Splenius Cervicus

A

Innervation: Dorsal rami of cervical nerves
Blood Flow: Descending branch of occipital artery
Action: Extends head

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14
Q

Rectus Capitis Posterior Major

A

Innervation: Suboccipital nerve
Blood Flow: Vertebral artery
Action: Extends and rotates head to same side

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15
Q

Rectus Capitis Posterior Minor

A

Innervation: Suboccipital nerve
Blood Flow: Vertebral artery
Action: Extends head

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16
Q

Obliquus Capitis Superior

A

Innervation: Suboccipital nerve
Blood Flow: Vertebral artery
Action: Extends and bends head laterally

17
Q

Obliquus Capitis Inferior

A

Innervation: Suboccipital nerve
Blood Flow: Vertebral artery
Action: Rotates atlas to turn face to same side

18
Q

Latissimus Dorsi

A

Extrinsic
Innervation: Thoracodorsal nerve
Blood Flow: Thoracodorsal artery
Action: Extends, adducts, and medially rotates humerus

19
Q

Triangle of Auscultation

A

Bounded by trapezius, latissimus dorsi, scapula

20
Q

Suboccipital Triangle

A

Bounded by rectus capitis posterior major, obliquous capitis superior and obliquous capitis inferior.

21
Q

Triangular Space

A

Bounded by teres major, teres minor, long head of triceps.

22
Q

Quadrangular Space

A

Bounded by teres major, teres minor, long head of triceps, humerus.

23
Q

Lumbar Triangle

A

Bounded by latissimus dorsi, external abdominal oblique, ilium.

24
Q

Ilium

A

Largest bone of the pelvis

25
Q

Greater Occipital Nerve

A

Dorsal rami of the C2 spinal nerve and is strictly sensory

26
Q

What are the three muscles that attach to the coracoid process?

A

Pectoralis minor, short head of the biceps and the coracobrachialis

27
Q

Acromion

A

Point that juts out laterally from the scapula

28
Q

Suboccipital Nerve

A

Dorsal rami of the C1 spinal nerve and is strictly motor

29
Q

Spinal Accessory Nerve

A

Also known as CN XI and is involved in the innervation of the trapezius

30
Q

Thoracodorsal Nerve

A

Has extensions of the C6, C7 and C8 spinal nerves and innervates the latissimus dorsi

Anatomy (41 decks)

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