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Muscle Anatomy > BACK & SPINAL CORD: Superficial back muscles > Flashcards

BACK & SPINAL CORD: Superficial back muscles Flashcards

(53 cards)

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1
Q

SUBOCCIPITAL MUSCLES

Rectus capitis posterior minor - origin

A

Posterior tubercle of atlas

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2
Q

SUBOCCIPITAL MUSCLES

Rectus capitis posterior minor - insertion

A

Medial part of inferior nuchal line

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3
Q

SUBOCCIPITAL MUSCLES

Rectus capitis posterior minor - innervation

A

Posterior ramus of spinal nerve C1 (suboccipital nerve)

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4
Q

SUBOCCIPITAL MUSCLES

Rectus capitis posterior minor - function

A

Atlantooccipital joint: Head extension

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5
Q

SUBOCCIPITAL MUSCLES

Rectus capitis posterior major - origin

A

Spinous process of axis

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6
Q

SUBOCCIPITAL MUSCLES

Rectus capitis posterior major - insertion

A

Lateral part of inferior nuchal line

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7
Q

SUBOCCIPITAL MUSCLES

Rectus capitis posterior major - innervation

A

Posterior ramus of spinal nerve C1 (suboccipital nerve)

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8
Q

SUBOCCIPITAL MUSCLES

Rectus capitis posterior major - function

A

Bilateral contraction - Atlantooccipital joint: Head extension
Unilateral contraction - Atlantoaxial joint: Head rotation (ipsilateral)

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9
Q

SUBOCCIPITAL MUSCLES

Obliquus capitis inferior - origin

A

Spinous process of axis

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10
Q

SUBOCCIPITAL MUSCLES

Obliquus capitis inferior - insertion

A

Transverse process of atlas

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11
Q

SUBOCCIPITAL MUSCLES

Obliquus capitis inferior - innervation

A

Posterior ramus of spinal nerve C1 (suboccipital nerve)

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12
Q

SUBOCCIPITAL MUSCLES

Obliquus capitis inferior - function

A

Bilateral contraction - Atlantooccipital joint: Head extension
Unilateral contraction - Atlantoaxial joint: Head rotation (ipsilateral)

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13
Q

SUBOCCIPITAL MUSCLES

Obliquus capitis superior - origin

A

Transverse process of atlas

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14
Q

SUBOCCIPITAL MUSCLES

Obliquus capitis superior - insertion

A

Occipital bone (between superior and inferior nuchal lines)

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15
Q

SUBOCCIPITAL MUSCLES

Obliquus capitis superior - innervation

A

Posterior ramus of spinal nerve C1 (suboccipital nerve)

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16
Q

SUBOCCIPITAL MUSCLES

Obliquus capitis superior - function

A

Bilateral contraction - Atlantooccipital joint: Head extension
Unilateral contraction - Atlantoaxial joint: Head lateral flexion (ipsilateral)

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17
Q

SUPERFICIAL LAYER

Trapezius [descending part] - origin

A

Medial third of superior nuchal line, External occipital protuberance, Spinous processes of cervical vertebrae/Nuchal ligament

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18
Q

SUPERFICIAL LAYER

Trapezius [transverse part] - origin

A

Broad aponeurosis at spinous processes of vertebrae T1-T4 (or C7-T3)

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19
Q

SUPERFICIAL LAYER

Trapezius [ascending part] - origin

A

Spinous processes of vertebrae T5-T12 (or T2-T12)

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20
Q

SUPERFICIAL LAYER

Trapezius [descending part] - insertion

A

Lateral third of clavicle

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21
Q

SUPERFICIAL LAYER

Trapezius [transverse part] - insertion

A

Medial aspect of acromion, Superior crest of spine of scapula

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22
Q

SUPERFICIAL LAYER

Trapezius [ascending part] - insertion

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A

Medial end of spine of scapula

23
Q

SUPERFICIAL LAYER

Trapezius - innervation

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A

Motor: Accessory nerve (CN XI)
Sensory: Anterior rami of spinal nerves C3-C4 (via cervical plexus)

24
Q

SUPERFICIAL LAYER

Trapezius [descending part] - function

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A

Scapulothoracic joint: Draws scapula superomedially
Atlantooccipital joint/upper cervical vertebrae: Extension of head and neck, Lateral flexion of head and neck (ipsilateral)
Altantoaxial joint: Rotation of head (contralateral)

25
SUPERFICIAL LAYER Trapezius [transverse part] - function
Scapulothoracic joint: Draws scapula medially
26
SUPERFICIAL LAYER Trapezius [ascending part] - function
Scapulothoracic joint: Draws scapula inferomedially (All parts support scapula)
27
SUPERFICIAL LAYER Levator scapulae - origin
Transverse processes of vertebrae C1-C4
28
SUPERFICIAL LAYER Levator scapulae - insertion
Medial border of scapula (from superior angle to root of spine of scapula)
29
SUPERFICIAL LAYER Levator scapulae - innervation
Anterior rami of spinal nerves C3-C4, Dorsal scapular nerve (C5)
30
SUPERFICIAL LAYER Levator scapulae - function
Scapulothoracic joint: Draws scapula superomedially, Rotates glenoid cavity inferiorly Cervical joints: Lateral flexion of neck (ipsilateral)
31
SUPERFICIAL LAYER Rhomboid major - origin
Spinous process of vertebrae T2-T5
32
SUPERFICIAL LAYER Rhomboid major - insertion
Medial border of scapula (from inferior angle to root of spine of scapula)
33
SUPERFICIAL LAYER Rhomboid major - innervation
Dorsal scapular nerve (C5)
34
SUPERFICIAL LAYER Rhomboid major - function
Scapulothoracic joint: Draws scapula superomedially, Rotates glenoid cavity inferiorly; Supports position of scapula
35
SUPERFICIAL LAYER Rhomboid minor - origin
Nuchal ligament, Spinous processes of vertebrae C7-T1
36
SUPERFICIAL LAYER Rhomboid minor - insertion
Root (medial end) of spine of scapula
37
SUPERFICIAL LAYER Rhomboid minor - innervation
Dorsal scapular nerve (C5)
38
SUPERFICIAL LAYER Rhomboid minor - function
Scapulothoracic joint: Draws scapula superomedially, Rotates glenoid cavity inferiorly; Supports position of scapula
39
SUPERFICIAL LAYER Latissimus dorsi [vertebral part] - origin
Spinous processes of vertebrae T7-T12, Thoracolumbar fascia
40
SUPERFICIAL LAYER Latissimus dorsi [iliac part] - origin
Posterior third of crest of ilium
41
SUPERFICIAL LAYER Latissimus dorsi [costal part] - origin
Ribs 9-12
42
SUPERFICIAL LAYER Latissimus dorsi [scapular part] - origin
Inferior angle of scapula
43
SUPERFICIAL LAYER Latissimus dorsi - insertion
Intertubercular sulcus of humerus
44
SUPERFICIAL LAYER Latissimus dorsi - innervation
Thoracodorsal nerve (C6-C8)
45
SUPERFICIAL LAYER Latissimus dorsi - function
Shoulder joint: Arm internal rotation, Arm adduction, Arm extension; Assists in respiration
46
INTERMEDIATE LAYER Serratus posterior superior - innervation
2nd-5th Intercostal nerves
47
INTERMEDIATE LAYER Serratus posterior superior - insertion
Superior borders of ribs 2-5
48
INTERMEDIATE LAYER Serratus posterior superior - origin
Nuchal ligament, spinous processes of vertebrae C7-T3
49
INTERMEDIATE LAYER Serratus posterior superior - function
Elevates ribs
50
INTERMEDIATE LAYER Serratus posterior inferior - origin
Spinous processes of vertebrae T11-L2
51
INTERMEDIATE LAYER Serratus posterior inferior - insertion
Inferior borders of ribs 9-12
52
INTERMEDIATE LAYER Serratus posterior inferior - innervation
Anterior rami of spinal nerves T9-T12 (a.k.a. 9th-11th Intercostal nerves + subcostal nerve)
53
INTERMEDIATE LAYER Serratus posterior inferior - function
Depresses ribs/ Draws ribs inferoposteriorly

Muscle Anatomy (19 decks)

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