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Anatomy > muscles of the back > Flashcards

muscles of the back Flashcards

1
Q

what separates the 2 groups of back muscles

A

thoracolumbar fascia

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2
Q

what are the groups of back muscles

A

extrinsic and intrinsic

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3
Q

what innervates the extrinsic back muscles

A

-hypaxial, ventral rami of spinal nerves

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4
Q

what innervates the trapezius

A

a cranial nerve

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5
Q

what is the function of extrinsic back muscles

A

move the limbs

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6
Q

what is the function of intrinsic back muscles

A

move the spine

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7
Q

what innervates the intrinsic back muscles

A

-epaxial
-dorsal rami of spinal nerves

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8
Q

what are the extrinsic back muscles from superficial to deep

A

trapezius, latissimus dorsi, levator scapulae, rhomboid minor, rhomboid major, serratus posterior superior, serratus posterior inferior

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9
Q

what are the intrinsic back muscles from superficial to deep

A

iliocostalis, longissimus, spinalis, multifidus, semispinalis, rotatores

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10
Q

what muscles make up the erector spinae groupe

A

iliocostalis, longisimuss, spinalis

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11
Q

what muscles make up the transversospinalis group

A

multifidus, semispinalis, rotatores

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12
Q

what is the role of the erector spinae group of muscles

A

keeps the spine erect and extends the spine

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13
Q

what is the role of the transversospinalis group

A

keeps the spine in line laterally

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14
Q

what does the dorsal ramus innervate

A

intrinsic back muscles and skin of the back

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15
Q

what does the ventral ramus innervate

A

extrinsic back muscles, anterior and lateral trunk and the limbs , this includes the cervical plexus, brachial plexus and the intercostal nerves

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16
Q

what do the extrinsic back muscles move

A

the shoulder and the humerus

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17
Q

what is the motor innervation and sensory innervation for the trapezius

A

motor: spinal accessory nerve
sensory: cervical plexus

18
Q

what is the motor innervation and sensory innervation for the latissimus dorsi

A

thoracodorsal nerve for both

19
Q

what is the motor and sensory innervation for the levator scapulae

A

C3 and C4 and dorsal scapular nerve for both

20
Q

what is the motor and sensory innervation for the rhomboid minor

A

dorsal scapular nerve for both

21
Q

what is the motor and sensory innervation for the rhomboid major

A

dorsal scapular nerve

22
Q

what is the motor and sensory innervation for the serratus posterior superior

A

intercostal nerve branches

23
Q

what is the motor and sensory innervation for the serratus posterior inferior

A

intercostal nerve branches

24
Q

what is another term for extrinsic back muscles

A

posterior axioappendicular muscles

25
Q

what do the posterior axioappendicular muscles attach

A

the scapular and humerus to the spine and/or ribs

26
Q

what makes up layer 1 of the extrinsic back muscles

A

trapezius and latissimus dorsi

27
Q

what does layer 1 of the extrinsic back muscles do

A

moves the scapula and humerus

28
Q

what makes up layer 2 of the extrinsic muscles of the back

A

levator scapulae, rhomboid minor, rhomboid major

29
Q

what does layer 2 of the extrinsic back muscles do

A

move the scapula

30
Q

what makes up layer 3 of the extrinsic back msucles

A

serratus posterior superior and serratus posterior inferior

31
Q

what does layer 3 of the extrinsic back muscles do

A

moves the ribs

32
Q

what do intrinsic back muscles do

A

move the vertebral column and maintain erect posture of the spine, and proprioception

33
Q

describe the location of the intrinsic back muscles

A

run longitudinally, deep to the serratus posterior muscles and are enclosed by throacolumbar fascia

34
Q

what are the layers of intrinsic muscles of the back from superficial to deep

A

splenius, erector spinae, and transversospinalis

35
Q

what are the insertion areas of the splenius muscles

A

capitus and cervicis

36
Q

what are the regions of the iliocostalis muscle

A

lumborum, thoracis, cervicis

37
Q

what are the regions of the longissimus muscle

A

thoracis, cervicis, and capitus

38
Q

what are the regions of the spinalis muscle

A

thoracis and cervicis

39
Q

what are the types of the rotatores muscle

A

longus and brevis

40
Q

what are the regions of the semispinalis muscle

A

cervicis and capitus

Anatomy (27 decks)

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