Movements of the spine Flashcards
Muscles involved in the movements of the spine
Which movements does the cervical spine allow?
Flexion, extension; left and right rotation; left and right lateral flexion
Which muscles are involved in cervical flexion?
Sternocleidomastoid, longus colli, longus capitis, scaleneus
What is the origin and insertion of the sternocleidomastoid?
O: manubrium of sternum + anterior superior of medial clavicle
I: mastoid process
What is the origin and insertion of the longus colli?
O: C3-T3
I: C1-C6
What is the origin and insertion of the longus capitis?
O: transverse process C3-C6
I: occipital bone
What is the origin and insertion of the scalenus?
O: C2-C7
I: 1st and 2nd ribs
Which muscles are involved in cervical extension?
Splenius, erector spinae, semispinalis
What is the origin and insertion of the splenius?
Splenius cervicis:- O: spinous processes T3-T6 I: transverse processes C1-C3 Splenius capitis:- O: lower 1/2 of ligament nuchae + spinous processes C7-T4 I: mastoid process + occipital bone
What is the origin and insertion of the erector spinae?
O: iliac crest + sacrum + pelvis
I: occipital bone
What is the origin and insertion of the semispinalis?
O: C4-T10
I: occipital bone + spinous processes C2-T4
Which muscles are involved in cervical rotation?
Sternocleidomastoid (contralateral), scalenus (contralateral), splenius (contralateral)
What is the origin and insertion of the sternocleidomastoid?
O: manubrium of sternum + anterior superior of medial clavicle
I: mastoid process
What is the origin and insertion of the scalenus?
O: C2-C7
I: 1st and 2nd ribs
What is the origin and insertion of the splenius?
Splenius cervicis:- O: spinous processes T3-T6 I: transverse processes C1-C3 Splenius capitis:- O: lower 1/2 of ligament nuchae + spinous processes C7-T4 I: mastoid process + occipital bone
Which muscles are involved in cervical lateral flexion?
Sternocleidomastoid (ipsilateral),scalenus (ipsilateral), splenius (ipsilateral)
What is the origin and insertion of the sternocleidomastoid?
O: manubrium of sternum + anterior superior of medial clavicle
I: mastoid process
What is the origin and insertion of the scalenus?
O: C2-C7
I: 1st and 2nd ribs
What is the origin and insertion of the splenius?
Splenius cervicis:- O: spinous processes T3-T6 I: transverse processes C1-C3 Splenius capitis:- O: lower 1/2 of ligament nuchae + spinous processes C7-T4 I: mastoid process + occipital bone