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MSK > Back: Muscles, Innervations, & Blood Supply > Flashcards

Back: Muscles, Innervations, & Blood Supply Flashcards

1
Q

Trapezius M.

A

Layer 1

Insertion:
scapular spine, lateral 1/3 of clavicle, acromion, spinous process

Origin: Superior Nuchal Line, External Occipital Protruberance

Innervation: Spinal Accessory Nerve or Cranial Nerve 11

Blood Supply: Transverse Cervical Artery

Action: retract scapula, elevate scapula, depress scapula, rotate glenoid cavity superiorly

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2
Q

Latissmus Dorsi M.

A

Layer 1

Insertion: intertubercular groove of the humerus
origin: Spinous Process of the t6-t12
Spinous Process of l1-l5
Iliac Crest
Median Sacral Crest of the Sacram
Action: medially rotate the humerus
adduct the humerus
extend the humerus (backwards thinking)
medially rotate the humerus

Innervation: Thoracodorsal Nerve
Blood Supply: Thoracodorsal Artery

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3
Q

Levator Scapulae M.

A

Layer 2

Origin: medial border of the scapula

Insertion: posterior tubercle of the transverse processes of the c1-c4 vertebrae

Action: elevate scapula, retract scapula, rotate glenoid cavity inferiorly (because its part of the scapula)

Innervation: Dorsal Scapular Nerve

Blood Supply: Dorsal Scapular Artery

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4
Q

Rhomboid Minor M.

A

Layer 2

Origin: spinous process of c7-t1

Insertion: medial border of the scapula

Action: retract scapula, elevate the scapula, rotate glenoid cavity inferiorly

Innervation: Dorsal Scapular Nerve

Blood Supply: Dorsal Scapular Artery

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5
Q

Rhomboid Major M.

A

Layer 2

Origin: spinous processes of t2-t5
Insertion: medial border of scapula
Action: retract scapula, elevate scapula, rotate glenoid cavity inferiorly

Innervation: dorsal scapular nerve
Blood Supply: dorsal scapular artery

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6
Q

Serratus Posterior Superior M.

A

Layer 3

Origin: spinous processes of c7-t3
Insertion: superior surface of ribs 2-5
Action: propioception, elevate the ribcage

Innervation: Intercostal Nerves of Ribs 2-5
Blood Supply: Superior Intercostal Artery

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7
Q

Serratus Posterior Inferior M.

A

Layer 3

Origin: Spinous Process of T11-L2
Insertion: Inferior Surface of the Ribs 8-12
Action: depress ribs during forced expiration, propioception

Innervation: Anterior Rami
Blood Supply: Lowest Posterior Intercostal Artery

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8
Q

Splenius Capitus M.

A

Layer 3 (start to get intrinsic)

Origin: lowest 1/2 of nuchal ligament
spinous process of c7-t3

Insertion: mastoid process of the temporal bone

Action: laterally flex the neck
extend the neck

Innervation: Dorsal Rami

Blood Supply: Occipital Artery??????

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9
Q

Splenius Cervicis M.

A

Layer 3 (start to get intrinsic)

origin: lowest 1/2 of nuchal ligament
spinous process of c7- t3

insertion: transverse processes of c1-c3

action: rotate the face laterally towards side of muscle
laterally flex the neck

Innervation: dorsal rami

Blood Supply: Occipital artery

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10
Q

Iliocostalis Cervicis M.

A

Layer 5 (deep intrinsic: apart of the erector spinae group)

Origin: costal angles of ribs 3-6

Insertion: posterior tubercle of transverse processes of c4-c6

Action: extend the neck, laterally flex the neck

Innervation: dorsal rami

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11
Q

Iliocostalis Thoracis M.

A

Layer 5 (deep intrinsic: a part of the erector spinae group)

Origin: costal angles of ribs 7-12

Insertion: Costal Angles of ribs 1-6

Action: maintain erect posture, extend the vertebral column

Innervation: dorsal rami

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12
Q

Iliocostalis Lumborum M.

A

Layer 5 (deep intrinsic: part of the erector spinae group)

Origin: lateral sacral crest
Insertion: costal angles of ribs 7-12
Action: maintain erect posture

Innervation: dorsal rami

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13
Q

Longissimus Capitis M.

A

Layer 5 (deep intrinsic: part of the erector spinae group)

Origin: transverse process of T1-T5
Insertion: Mastoid process of temporal bone
Action: flex the neck toward the muscle, rotate the neck toward the muscle

Innervation: Dorsal Rami

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14
Q

Longissimus Cervicis M.

A

Layer 5 (deep intrinsic: part of the erector spinae group)

Origin: transverse processes of t1-t5

Insertion: posterior tubercles of transverse processes and articular processes of c2-c6

action: laterally flex the neck, extend the neck
innervation: dorsal rami

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15
Q

Longissimus Thoracis M.

A

Layer 5 (deep intrinsic: part of the erector spinae group)

Origin: Intermediate Sacral Crest
Insertion: Ribs 3-12 of costal angles
Action: maintain erect posture
Innervation: dorsal rami

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16
Q

Spinalis Capitis M.

A

Layer 5 (deep intrinsic: part of erector spinae group)

Origin: spinous processes of C7
Insertion: external occipital protuberance
Action: extend the neck, laterally flex the vertebrae of the cervical region

Innervation: Dorsal Rami

17
Q

Spinalis Cervicis M.

A

Layer 5 (deep intrinsic: part of the erector spinae group)

Origin: spinous process of c7
Insertion: spinous process of c2
action: extend the neck (bilaterally)

Innervation: Dorsal Rami

18
Q

Spinalis Thoracis M.

A

Layer 5 (deep intrinsic: part of the erector spinae group)

Origin: spinous process of T11-L2
Insertion: spinous processes of T1-T8
Action: Maintain erect posture, extend the vertebral column

Innervation: Dorsal Rami

19
Q

Semispinalis Capitis M.

A

Layer 6 (deep intrinsic: Transversospinalis Group)

Origin: transverse process of C7-T6
Insertion: between superior and inferior nuchal line
Action: Extend the head, rotate the face

Innervation: Dorsal Rami

20
Q

Semispinalis Cervicis M.

A

Layer 6 (deep intrinsic: Transversospinalis Group)

Origin: transverse processes of T1-T6
Insertion: Spinous Processes of C2-C5
Action: Extend the spine, rotate the spine away

Innervation: Dorsal Rami

21
Q

Semispinalis Thoracis M.

A

Layer 6 (deep intrinsic: transversospinalis group)

Origin: transverse process of T6-T12
Insertion: spinous processes of C6-T4
Action: Extend the spine, rotate the spine away from the rib cage

Innervation: dorsal rami

22
Q

Rectus Capitis Posterior Major M.

A

Insertion: Lateral aspect of inferior nuchal line of occipital bone

Origin: spinous process of axis

Action: extend the head, rotate the face toward you

Innervation: suboccipital Nerve

23
Q

Rectus Capitis Posterior Minor M.

A

Insertion: inferior nuchal line of occipital bone

Origin: posterior tubercle of atlas
Action: extend the neck

Innervation: Suboccipital Nerve

24
Q

Obliquus Capitis Superior M.

A

Insertion: between superior nuchal line and inferior nuchal line of occipital bone

Origin: transverse process of atlas
Action: extend the head, laterally flex the neck

Innervation: suboccipital nerve

25
Q

Obliquus Capitis Inferior M.

A

Insertion: Transverse process of atlas
Origin: Spinous process of axis
Action: rotate the face toward muscle

Innervation: Suboccipital Nerve

MSK (11 decks)

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