Exam III Muscles Flashcards
What muscles have attachments to the scapula?
- Trapezius
- rhomboids
- levator scapulae
What muscles have attachments to the occipital bone?
- trapezius
- splenius capitus
- spinalis
What muscles have attachments to the vertebra prominens?
- trapezius
- splenius capitus
What muscles have attachments to the nuchal ligament?
- trapezius
- spinalis
- splenius capitus
What muscles elevate the scapula?
- trapezius
- rhomboids
- levator scapulae
What muscles have the action of lateral flexion and extension of the column?
erector spinae muscles
trapezius attachments
- clavicle
- scapula (spine & acromion)
- occipital bone
- vertebra prominens
- nuchal ligament
trapezius innervation
CN 11
Trapezius action
- upper region: elevates and medially rotates scapula
- lower region: depresses scapula
Latissimus dorsi attachments
- T6-12 spinous processes
- sacral and lumbar spines by thoracolumbar fascia
- ilium
- humerus
Latissimus dorsi innervation
thoracodorsal nerve
Latissimus dorsi action
adduction, extension, and medial rotation of arm
rhomboid major attachment
- T2-5 spinous processes
- medial scapula
rhomboid minor attachment
- C7-T1 spinous processes
- scapula
rhomboid minor and major innervation
dorsal scapular nerve
rhomboid minor and major action
retraction (adduction) and elevation of scapula
levator scapulae attachment
- C1-4 transverse processes
- scapula
levator scapulae innervation
- dorsal scapular nerve
- C3-4 ventral rami (cervical plexus)
levator scapulae action
- elevation of scapula
- lateral flexion of neck
Serratus posterior superior attachment
- C7-T3 spinous processes
- ribs 2-5
serratus posterior inferior attachment
- T11-L2
- ribs 9-12
Serratus posterior superior innervation
T1-3 intercostal nerves
serratus posterior inferior innervation
- T10-11 intercostal nerves
- subcostal nerve (T12 spinal nerve)
Serratus posterior superior action
elevation of ribs 2-5
serratus posterior inferior action
lowers ribs 9-12
iliocostalis attachments
- ribs
- cervical transverse processes
iliocostalis innervation
dorsal rami
iliocostalis action
lateral flexion and extension of column
spinalis attachments
- occipital bone
- nuchal ligament
- spinous processes
spinalis innervation
dorsal rami
spinalis action
lateral flexion and extension of column
longissimus attachments
- ribs
- transverse processes
- iliac crest & sacrum
- spinous processes of sacrum and lumbar vertebrae
- supraspinous ligament
longissimus innervation
dorsal rami
longissimus action
- lateral flexion and extension of column
- rotation and extension of head
splenius capitus attachment
- mastoid bone
- occipital bone
- nuchal ligament
- vertebra prominens
- T1-T3 spinous processes
splenius capitus innervation
C3-5 dorsal rami
