Week 1 (Back Muscles) Flashcards by Kavita Rana

Latissimus Dorsi:

attachments 
function innervation

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

How well did you know this?

Not at all

Perfectly

Trapezius

location

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

How well did you know this?

Not at all

Perfectly

Inferior trapezius:

location function

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

- Depresses scapula

How well did you know this?

Not at all

Perfectly

Middle trapezius

location function

acromion to the superior nuchal line

retracts scapula

How well did you know this?

Not at all

Perfectly

Superior trapezius

location function

lateral ⅓ of clavicle to the external occipital protuberance

elevate scapula

How well did you know this?

Not at all

Perfectly

Trapezius

innervation

accessory nerve and the transverse cervical artery

How well did you know this?

Not at all

Perfectly

Rhomboid Major

location
function  innervation

under spine of scapula

retract scapula

dorsal scapular nerve bundle

How well did you know this?

Not at all

Perfectly

Rhomboid minor

location
function innervation

over spine of scapula

retreact scapula

dorsal scapular nerve bundle

How well did you know this?

Not at all

Perfectly

Levator scapulae

attachments
function  innervation

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

elevates scapula

dorsal scapular nerve bundle

How well did you know this?

Not at all

Perfectly

deltoid

attachments
function  innervation

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

How well did you know this?

Not at all

Perfectly

Borders of the quadrangular space

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

How well did you know this?

Not at all

Perfectly

Occipital artery and Greater Occipital Nerve

artery is more lateral than nerve

How well did you know this?

Not at all

Perfectly

Triangle of Auscultation

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

How well did you know this?

Not at all

Perfectly

Lumbar triangle

bordered by external oblique, iliac crest and LD

How well did you know this?

Not at all

Perfectly

Serratus Posterior Superior

attachment
function
innervation

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

Action: elevates ribs 2-5

Innervation: anterior rami T2-T5

How well did you know this?

Not at all

Perfectly

Serratus Posterior Inferior

attachment
function
innervation

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

Action: depresses ribs 9-12

Innervation: anterior rami T9-T12

How well did you know this?

Not at all

Perfectly

Splenius muscles

function
innervation

Study These Flashcards

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

innervation: posterior/dorsal rami of middle cervical nerves

Splenius capitis

attachments

Study These Flashcards

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

Erector spinae muscles

inferior attachments

function

innervation

Study These Flashcards

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

Transversospinalis muscles

where are they?

attachment

Study These Flashcards

deep to the erector spinae muscles

attach from transverse processes to spinous processes

semispinalis capitis

attachment

function

innervation

Study These Flashcards

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

semispinalis cervicis

attachment

function

innervation

Study These Flashcards

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

Multifidus

attachment

function

innervation

Study These Flashcards

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

Triceps Brachii muscle

attachment

function

innervation

Study These Flashcards

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

Teres major attachment function innervation

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

Rotator Cuff Muscles

supraspinatous infraspinatous teres minor subscapularis

Supraspinatus attachment function innervation

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

Infraspinatous attachment function innervation

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

Teres Minor attachment function innervation

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

Subscapularis attachment function innervation

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

Triangular space boundaries

-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

Triangular space innervation

circumflex scapular artery

Triangular interval boundaries

- 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

Triangular interval innervation

radial nerve and deep brachial artery

layers of the meninges

dura mater arachnoid mater pia mater

where does the spinal cord end?

conus medullaris

how do the dorsal and ventral roots travel?

travel together into a bulge covered by dura

how does the bulge split?

splits into ventral ramus and dorsal ramus

ventral ramus innervation

hypaxial muscles

dorsal ramus

epaxial muscles

hypaxial muscles

anterolateral trunk and limbs

epaxial muscles

erector spinae and deep muscles of the back

Week 1 (Back Muscles) Flashcards

(42 cards)