Back Muscles

Back Muscles

Posterior Thorax		Posterior Region of the Neck
Trapeze Back Latissimo Rhomboid Scapula Lifter Minor Post Poster Superior Minor Postero-Lower		Splenium of the Head Neck Splenium Semispinal Head Semispinal Neck Chest Semi-Spinal
Spinal Gutter		Suboccipital Triangle
Spine Erectors Rotators Multifid Intertransversal Interspinates		Posterior Posterior Straight of the Head Posterior Posterior Straight of the Head Upper Oblique Head Lower Oblique Head

Posterior Thorax

1. Trapeze

Medial Insertion: Upper nuchal line, nuchal ligament and spinous processes from C7 to T12

Lateral Insertion: Posterior edge of the clavicle, acromion and spine of the scapula

Innervation: Accessory Nerve (XI cranial nerve) and Trapezius nerve (C3 & #8211; C4)

Action:

* Fixed in ColumnShoulder Elevation, Scapula Adduction, Superior Scapula Rotation and Shoulder Depression

 

* Fixed on the shoulder blade:

Unilateral contraction: Homolateral Tilt and Contralateral Head Rotation

Bilateral contraction: Head Extension

2. Very Late in Sleep

Medial Insertion: Spinous processes of the 6th last thoracic and all lumbar vertebrae, sacrum crest, 1/3 posterior iliac crest and outer face of the last 4 ribs

Lateral Insertion: Intertubercular Groove

Innervation: Thoracodorsal Nerve (C6 & #8211; C8)

Action: Adduction, Extension and Medial Rotation of the Arm. Shoulder Depression

 

 

3. ROMBOID

Medial Insertion: C7 to T5 spinous processes

Lateral Insertion: Medial border of the scapula

Innervation: Dorsal Scapular Nerve (C5)

Action: Adduction and Lower Rotation of the Scapulae and Shoulder Elevation

 

4. SCOPE LIFT

Lower Insertion: Upper Angle of Scapula

Superior Insertion: Transverse process from atlas to C4

Innervation: Dorsal Scapular Nerve (C5)

Action: Scapula Elevation and Adduction. Homolateral Tilting and Rotation of the Cervical Spine and Head Extension

 

 

5. MINOR POSTER-TOP SERRABLE

Medial Insertion: C7 to T3 spinous processes

Lateral Insertion: Upper edge and outer face of 2nd to 5th ribs

Innervation: Branches of the first 4 intercostal nerves

Action: Elevation of the first ribs (inspiratory action)

 

 

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6. MINOR POSTER LOWER POSTER

Medial Insertion: Thorny Processes from T11 to L3

Lateral Insertion: Bottom edge and outer face of the last 4 ribs

Innervation: 9th to 12th intercostal nerves

Action: Depression of last ribs (expiratory action)

 

 

 

 

 

Posterior Region of the Neck

1. HEAD SPLENDIUM

Superior Insertion: 1/3 lateral superior nuchal line and temporal bone mastoid process

Lower Insertion: C7 to T4 spinous processes

Innervation: Spinal nerves of the corresponding segment

Action: Extension, Tilt and Homolateral Head Rotation

 

 

 

 

2. NECK Splenium

Superior Insertion: Transverse process of the first 3 cervical vertebrae

Lower Insertion: Spinous process from T3 to T6

Innervation: Spinal nerves of the corresponding segment

Action: Extension, Tilt and Homolateral Head Rotation

 

 

 

3. SEMISPINHAL HEAD

Superior Insertion: Between the upper and lower nuchal line

Lower Insertion: Transverse process from T1 to T7 and articular processes from C5 to C7

Innervation: Spinal nerves of the corresponding segment

Action: Head Extension and Homolateral Head Tilt

 

 

 

 

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4. NECK SPINE

Superior Insertion: Spinous process from C1 to C7

Lower Insertion: Transverse Processes from T1 to T6

Innervation: Spinal nerves (dorsal branches)

Action: Neck Extension and Contralateral Rotation

 

 

 

5. Semi-Thorax Thorax

Superior Insertion: Spinous Process C6 to T4

Lower Insertion: Transverse Processes from T6 to T10

Innervation: Spinal nerves (dorsal branches)

Action: Neck Extension and Contralateral Rotation

 

 

 

 

Suboccipitals & #8211; Suboccipital Trine

1. LARGER REAR HEAD STRAIGHT

Superior Insertion: Lower nuchal line

ILower Insert: Spiny axis process

Innervation: Cervical Plexus (C1)

Action: Head Extension and Contralateral Rotation

 

 

 

 

 

2. LOWER HEAD REAR STRAIGHT

Superior Insertion: Lower nuchal line

Lower Insertion: Atlas posterior arch tuber

Innervation: Cervical Plexus (C1)

Action: Head Extension

 

 

 

 

3. HEAD TOP OBLIQUE

Superior Insertion: Between the upper and lower nuchal lines

Lower Insertion: Atlas Transverse Process

Innervation: Cervical Plexus (C1)

Action: Extension, Homolateral Tilt, and Contralateral Head Rotation

 

 

 

 

4. LOWER HEAD OBLIGO

Superior Insertion: Atlas Transverse Process

Lower Insertion: Spiny axis process

Innervation: Cervical Plexus (C2)

Action: Atlas Extension and Homolateral Rotation

 

 

 

 

Spinal Gout Muscles & #8211; Paravertebral

SPINE ERRORS

SPINHAL (+ Medial)

Head Portion:

Attached to the semi-spinal head

Neck portion:
Source: Nucal ligament and spinous processes from C7 to T2
Insertion: C2 to C4 spinous processes

Chest Portion:
Source: Thorny Processes T11 to L2
Insertion: Upper thoracic spinous processes (ranges from 4 to 8)

Innervation: Spinal nerves (dorsal branches)

Action: Spinal Extension

 

LONG DORSAL (Intermediate)

Head portion:
Superior Insertion: Mastoid Process
Lower Insertion: T1 to T4 transverse processes and C4 to C7 joint processes

Neck portion:
Superior Insertion: Transverse Processes from C2 to C6
Lower Insertion: Transverse Processes from T1 to T4

Chest Portion:
Superior Insertion: Transverse processes of the thoracic vertebrae and the last 10 ribs
Lower Insertion: Transverse processes of lumbar vertebrae and lumbocostal aponeurosis

Innervation: Spinal nerves (dorsal branches)

Action: Spinal Homolateral Extension and Tilt

 

 

ILIOCOSTAL (+ Lateral)

Cervical portion:
Superior Insertion: Transverse Processes from C4 to C6
Lower Insertion: 3rd to 6th rib angle

Thoracic Portion:
Superior Insertion: Angle of the first 6 ribs and C7 transverse process
Lower Insertion: Angle of the last 6 ribs

Lumbar Portion:
Superior Insertion: Angle of the last 6 ribs
Lower Insertion: Sacral Dorsal Face

Innervation: Spinal nerves (dorsal branches)

Action: Spinal Homolateral Extension and Tilt

 

ROUTORS

Inserts: It extends from the sacrum to C2. They connect the transverse process of a vertebra with the spinous process of the overlying vertebra.

Innervation: Spinal nerves of the corresponding segment

Action: Contralateral Spinal Extension and Rotation

 

 

 

MULTIPLE

Source: Back of the sacrum, PPE, lumbar nipple processes, transverse thoracic process and joint processes from C4 to C7

Insertion: Spinous process of 3 to 5 vertebrae above

Innervation: Spinal nerves of the corresponding segment

Action: Spinal Stabilization and Extension

 

 

 

INTERTRANSVERSALS

Superior Insertion: Transverse process of upper vertebra

Lower Insertion: Transverse process of the lower vertebra

Innervation: Spinal nerves of the corresponding segment

Action: Homolateral Spinal Tilt

 

 

Interspecials

Superior Insertion: Spinous process of the upper vertebra

Lower Insertion: Spinous process of the lower vertebra

Innervation: Spinal nerves of the corresponding segment

Action: Spinal Extension

 

 

Back Muscles Rear View & #8211; Surface layer

Source: NETTER, Frank H .. Atlas of Human Anatomy. 2 ed. Porto Alegre: Artmed, 2000.

 

Back Muscles Rear View & #8211; Intermediate Layer

Source: NETTER, Frank H .. Atlas of Human Anatomy. 2 ed. Porto Alegre: Artmed, 2000.

 

Back Muscles Rear View & #8211; Deep layer

Source: NETTER, Frank H .. Atlas of Human Anatomy. 2 ed. Porto Alegre: Artmed, 2000.

Other Muscle Groups

Face ATM Neck Chest Abdomen Superior Member Lower member   Test Your Muscle System Knowledge