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BIO 460 > Muscles of the Back > Flashcards

Muscles of the Back Flashcards

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1
Q

What are the Superficial or Extrinsic muscles of the back?

A

Trapezius

Latissimus Dorsi

Rhomboids (major/minor)

Levator Scapula

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2
Q

What is the OIA and insertion of the trapezius?

A

O: External Occipital Protuberance/Nuchal Ligament/Spinous Process of C7-T12

I: Lateral 3rd of clavicle/acromion & spine of scapula

A: Elevates, depresses, rotates, fixes scapula; extends neck

Innervation: Accessory Nerve & cervical plexus

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3
Q

What are the muscles of the intermediate back?

A
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4
Q

What are the muscles of the Deep Superficial back?

A

Splenius Capitis

Splenius Cervicis

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5
Q

What are the muscles of the Deep Intermediate back?

A

Erector Spinae

(going from lateral to medial)

a. illiocostalis
b. longissimus
c. spinalis

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6
Q

What are the muscles of the Deep Deep back?

A

Multifidi

Rotatores

Semispinalis Capitis

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7
Q

What are all of the Deep muscles of the back innervated by?

A

They are all innevervated by the dorsal rami of the spinal nerve.

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8
Q

What is the OIA and innervation of the Latissimus Dorsi?

A

O:Thoracolumbar Fascia T7-L5, sacrum and illiac crest

I:Intertubercular groove

A: Adduction/ Extension

Innervation: Thoracodorsal N.

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9
Q

What is the OIA of the Rhomboidius Major?

A

O: T1-T4

I: Medial border of scapula

A: Retraction/fixes the scapula

Innervation: Dosral scapular n.

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10
Q

What is the OIA of the rhomboideus minor?

A

O: C6-C7

I: Medial border of scapula

A: Retraction/fixes the scapula

Innervation: Dosral scapular n.

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11
Q

What is the OIA of the levator scapula?

A

O: C1-C4

I: Superior angle of scapula

A: Elevation of scapula/laterally fixes neck

Innervation: Dosral scapular n.

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12
Q

What is the OIA of the Serratus Posterior Superior?

A

O: C7-T3

I: Superior border of ribs 2-5

A: Mostly proprioception but also helps with respiration, elevates ribs

Innervation: 1st intercostal n.

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13
Q

What is the OIA of the serratus posterior inferior?

A

O: T11-T12

I: Inferior border of ribs 10-12

A: Mostly proprioception but also helps with respiration, depresses ribs

Innervation: Last 4 intercostals

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14
Q

What type of felxion do the Splenius Capitis and Splenius Cervicis do?

A

Ipsolateral lateral flexion

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15
Q

What type of flexion does the erector spinae do when one side is flexed?

A

Ipsolateral lateral flexion

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16
Q

What type of flexion does the erector spinae do when both sides are flexed?

A

Extension of the back

17
Q

By what segments do the multifidi go for OI?

A

2 - 4 segments on vertebrae

18
Q

By what segments do the rotatores go for OI? What do they do?

A

They go by segements of 1-2 and they help with proprioception.

19
Q

By what segments do the semispinalis go by in OI?

A

They go by segments of 4-6

20
Q

What type of roation does the semispinalis do?

A

The semispinalis does contralateral lateral rotation

21
Q

What are the muscles that help with proprioception?

A

Serratus Posterior

Rotatores

Transversospinalis

22
Q

What muscles make up the transversospinalis and what do they do?

A

The transversospinalis is made up of the:

Semispinalis

Multifidus

Rotatores

(going superficial to deep)

They help with fine tune motor but mostly do proprioception

23
Q

What type of flexion and rotation does the sternocleidomastoid do?

A

Contralateral lateral rotation

Ipsolateral lateral flexion

24
Q

What is a myotome?

A

All muscles innervated by one spinal nerve

25
Q

What is an epimere?

A

They form the deep muscles of the back and are innervated by the dorsal ramus of the spinal nerve

26
Q

What is a hypomere?

A

They form the superficial muscles of the back and are innevated by the ventral ramus of the spinal nerve

27
Q

What is a dermatome?

A

All skin innervated by one spinal nerve

28
Q

Order the muscles of the transversospinalis.

A

Superficial to deep

Semispinalis

Multifidi

Rotatores

29
Q

What type of rotation does the sternocleidomastoid do?

A

The sternocleidomastoid does contralateral lateral rotation.

30
Q

What type of flexion does the sternocleidomastoid do?

A

The sternocleidomastoid does ispsilateral lateral flexion.

31
Q

What is the OI of the sterncleidomastoid?

A

O: Sternum/clavicle

I: Mastoid process

BIO 460 (10 decks)

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