Muscles of the Back and Craniocervical Regions: Muscles of the Craniocervical Region Flashcards
Splenius Muscles Proximal Attachment
Splenius cervicis and capitis: Ligamentum nuchae and spinous processes of C7-T4 vertebrae
Splenius Muscles Distal Attachment
Splenius Cervicis: Posterior tubercles of the transverse processes of C1-C3 vertebrae
Splenius Capitis: Mastoid process and lateral end of the superior nuchal line
Splenius Muscles Innervation
Posterior rami of spinal nn. C2-C6
Splenius Muscles Action
Unilaterally: Rotates the head/neck to the same side Laterally flexes the head/neck Bilaterally Extends the head/neck
Rectus Capitis Posterior Major Proximal Attachment
Spinous process of C2
Rectus Capitis Posterior Major Distal Attachment
Lateral part of the inferior nuchal line
Rectus Capitis Posterior Major Innervation
Suboccipital n. (posterior ramus of C1)
Rectus Capitis Posterior Major Action
Extends the head
Rotates the head to the same side
Rectus Capitis Posterior Minor Proximal Attachment
Posterior tubercle of C1
Rectus Capitis Posterior Minor Distal Attachment
Medial part of the inferior nuchal line
Rectus Capitis Posterior Minor Innervation
Suboccipital n. (posterior ramus of C1)
Rectus Capitis Posterior Minor Action
Extends the head
Superior Oblique Proximal Attachment
Transverse process of C1
Superior Oblique Distal Attachment
Occipital bone between the inferior and superior nuchal line
Superior Oblique Innervation
Suboccipital n. (posterior ramus of C1)
Superior Oblique Action
Extends the head
Inferior Oblique Proximal Attachment
Spinous process of C2
Inferior Oblique Distal Attachment
Transverse process of C1
Inferior Oblique Innervation
Suboccipital n. (posterior ramus of C1)
Inferior Oblique Action
Rotates C1 to the same side
Longus Colli Proximal Attachment
Upper part: Transverse processes of C3-C5
Lower part: Bodies of C5-T3
Longus Colli Distal Attachment
Upper part: Bodies of C1-C3
Lower part: Transverse processes of C3-C6
Longus Colli Innervation
Anterior rami of C2-C6
Longus Colli Action
Flexes the neck
Longus Capitis Proximal Attachment
Transverse processes of C3-6
Longus Capitis Distal Attachment
Basilar portion of the occipital bone
Longus Capitis Innervation
Anterior rami of C1-C3
Longus Capitis Action
Flexes the head
Rectus Capitis Anterior Proximal Attachment
Lateral mass of the atlas
Rectus Capitis Anterior Distal Attachment
Basilar portion of occipital bone
Rectus Capitis Anterior Innervation
Anterior ramus of C1
Rectus Capitis Anterior Action
Flexes the O-A joint
Rectus Capitas Lateralis Proximal Attachment
Transverse process of the atlas
Rectus Capitas Lateralis Distal Attachment
Occipital bone anterolateral to foramen magnum
Rectus Capitas Lateralis Innervation
Anterior ramus of C1
Rectus Capitas Lateralis Action
Laterally flexes the head
Sternocleidomastoid Proximal Attachment
Mastoid process of the temporal bone
Sternocleidomastoid Distal Attachment
Sternal head: Manubrium of the sternum
Clavicular head: Medial end of the clavicle
Sternocleidomastoid Innervation
Spinal accessory n. (CN XI) and anterior rami of C2-3
Sternocleidomastoid Action
Unilaterally: Laterally flexes the head/neck Rotates the head/neck to the opposite side Bilaterally: Extends the head Flexes the neck
Anterior Scalene Proximal Attachment
Transverse processes of C3-6
Anterior Scalene Distal Attachment
1st rib
Anterior Scalene Innervation
Anterior rami of C4-6
Anterior Scalene Action
Unilaterally: Laterally flexes the head/neck Rotates the head/neck to the opposite side Bilaterally: Flexes the head/neck Elevates 1st rib
Middle Scalene Proximal Attachment
Transverse process of C2-7
Middle Scalene Distal Attachment
1st rib
Middle Scalene Innervation
Anterior rami of C3-8
Middle Scalene Action
Unilaterally: Laterally flexes the head/neck Bilaterally: Flexes the head/neck Elevates 1st rib
Posterior Scalene Proximal Attachment
Transverse processes of C4-6
Posterior Scalene Distal Attachment
2nd rib
Posterior Scalene Innervation
Anterior rami of C6-8
Posterior Scalene Action
Laterally flexes the neck