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COMP 1 > Week 1 (Back Muscles) > Flashcards

Week 1 (Back Muscles) Flashcards

1
Q

Latissimus Dorsi:

attachments 
function innervation
A

Medial attachment: Inserts inferiorly at the thoracolumbar fascia from T7 to L5
Lateral attachment: Travels superiorly and laterally and inserts in intertubercular sulcus

Function: internally/medially rotates the arm, extend the arm, and adduct the arm

Innervation: thoracodorsal nerve

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2
Q

Trapezius

location

A

T12 spinous process and travels up to the external occipital protuberance at the back of the skull

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3
Q

Inferior trapezius:

location function

A
  • T12 to C7 and goes out to the spine of the scapula

- Depresses scapula

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4
Q

Middle trapezius

location function

A

acromion to the superior nuchal line

retracts scapula

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5
Q

Superior trapezius

location function

A

lateral ⅓ of clavicle to the external occipital protuberance

elevate scapula

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6
Q

Trapezius

innervation

A

accessory nerve and the transverse cervical artery

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7
Q

Rhomboid Major

location
function  innervation
A

under spine of scapula

retract scapula

dorsal scapular nerve bundle

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8
Q

Rhomboid minor

location
function innervation
A

over spine of scapula

retreact scapula

dorsal scapular nerve bundle

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9
Q

Levator scapulae

attachments
function  innervation
A

medial attachment: superior border of scapula, attaches to the transverse processes of C1 to C4

elevates scapula

dorsal scapular nerve bundle

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10
Q

deltoid

attachments
function  innervation
A

Attachments:
Medial- acromion, spine of scapula, lateral 1/3 of clavicle
Lateral- deltoid tuberosity of humerus

Functions:
Anterior: flexes arm
Lateral: abduct arm
Posterior: extend arm backwards

Innervation
axillary nerve and posterior circumflex humeral artery

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11
Q

Borders of the quadrangular space

A

long head of triceps, lateral head of triceps, teres major and teres minor

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12
Q

Occipital artery and Greater Occipital Nerve

A

artery is more lateral than nerve

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13
Q

Triangle of Auscultation

A

Bordered by:
superior border of LD
lateral border of trapezius
medial border of scapula

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14
Q

Lumbar triangle

A

bordered by external oblique, iliac crest and LD

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15
Q

Serratus Posterior Superior

attachment
function
innervation

A

Medial attachments: spinous processes C7-T3
Lateral attachments: superior border of ribs 2-5

Action: elevates ribs 2-5

Innervation: anterior rami T2-T5

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16
Q

Serratus Posterior Inferior

attachment
function
innervation

A

Medial attachments: spinous processes T11-L2
Lateral attachments: inferior border of ribs 9-12

Action: depresses ribs 9-12

Innervation: anterior rami T9-T12

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17
Q

Splenius muscles

function
innervation
A

unilateral: laterally flexes and rotates head or neck to same side
bilateral: extends head and neck

innervation: posterior/dorsal rami of middle cervical nerves

18
Q

Splenius capitis

attachments

A

inferior: ligamentum nuchae, spinal processes C7-T4
superior: mastoid process, lateral 1/3 of clavicle

19
Q

Erector spinae muscles

inferior attachments

function

innervation

A

inferior attachment: medial sacral crest, posterior surface of sacrum, SP L and lower T, medial part of iliac crest

function: extension of back and side bend to one side
innervation: dorsal/posterior rami of lower cervical nerves

20
Q

Transversospinalis muscles

where are they?

attachment

A

deep to the erector spinae muscles

attach from transverse processes to spinous processes

21
Q

semispinalis capitis

attachment

function

innervation

A

Inferior attachment: TP C7-T6/T7, AP C4-C6
Superior attachment: between superior and inferior nuchal lines of occipital bone medially

Action:
Unilateral: extends and laterally rotates head to opposite side
Bilateral: extends head

Innervation: posterior/dorsal rami of spinal nerves; greater occipital nerve

22
Q

semispinalis cervicis

attachment

function

innervation

A

Inferior attachment: TP T1-T5/T6
Superior attachment: SP C2-C5

Action:
Unilateral: extends and laterally rotates neck to opposite side
Bilateral- extends neck

Innervation: posterior/dorsal rami of spinal nerves

23
Q

Multifidus

attachment

function

innervation

A

Inferior attachment: sacrum, ilium, TP T1-L5, AP C4-C7
Superior attachment: SP L5-C2

Action: extends and rotates VT to opposite side

Innervation: dorsal/posterior rami of spinal nerves

24
Q

Triceps Brachii muscle

attachment

function

innervation

A

Proximal attachments:
Long head: infraglenoid tubercle of the scapula
Medial and lateral heads: posterior surface of the humerus
Distal attachments: olecranon process of the ulna

Action: extends the forearm; long head extends and adducts the arm

Innervation: radial nerve

25
Q

Teres major

attachment

function

innervation

A

Medial attachments: inferior angle of the scapula
Lateral attachments: medial lip of the intertubercular sulcus of the humerus

Action: adducts and medially rotates the humerus

Innervation: lower subscapular nerve

26
Q

Rotator Cuff Muscles

A

supraspinatous
infraspinatous
teres minor
subscapularis

27
Q

Supraspinatus

attachment

function

innervation

A

Medial attachments: supraspinous fossa of the scapula
Lateral attachments: superior facet of the greater tubercle of the humerus

Action: abducts the humerus

Innervation: suprascapular nerve

28
Q

Infraspinatous

attachment

function

innervation

A

Medial attachments: infraspinous fossa of the scapula
Lateral attachments: middle facet of the greater tubercle of the humerus

Action: laterally/externally rotates the humerus

Innervation: suprascapular nerve and artery

29
Q

Teres Minor

attachment

function

innervation

A

Medial attachments: lateral border of the scapula
Lateral attachments: inferior facet of the greater tubercle of the humerus

Action: laterally/externally rotates the humerus

Innervation: axillary nerve

30
Q

Subscapularis

attachment

function

innervation

A

Medial attachments: subscapular fossa
Lateral attachments: lesser tubercle of the humerus (anterior side)

Action: medially/internally rotates the humerus

Innervation: upper and lower subscapular nerve

31
Q

Triangular space

boundaries

A

-Medial to the quadrangular space
-superiorly by the inferior border of the teres minor muscle
-inferiorly by the superior border of the teres
major muscle
-laterally by the medial border of the long head of the triceps brachii muscle

32
Q

Triangular space

innervation

A

circumflex scapular artery

33
Q

Triangular interval

boundaries

A
  • Inferior to the quadrangular space
  • Bound medially by the long head of the triceps brachii muscle
  • Bound laterally by the lateral head of the triceps brachii muscle
  • Bound superiorly by the inferior border of the teres major muscle
34
Q

Triangular interval

innervation

A

radial nerve and deep brachial artery

35
Q

layers of the meninges

A

dura mater
arachnoid mater
pia mater

36
Q

where does the spinal cord end?

A

conus medullaris

37
Q

how do the dorsal and ventral roots travel?

A

travel together into a bulge covered by dura

38
Q

how does the bulge split?

A

splits into ventral ramus and dorsal ramus

39
Q

ventral ramus

innervation

A

hypaxial muscles

40
Q

dorsal ramus

A

epaxial muscles

41
Q

hypaxial muscles

A

anterolateral trunk and limbs

42
Q

epaxial muscles

A

erector spinae and deep muscles of the back

COMP 1 (3 decks)

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