Anatomy Block 1: Attachments, Actions, and Innervations

Name the trapezius attachments

External Occipital Protuberance

ligamentum nuchae

spinous process C1-T12

lateral 1/3 clavicle

scapular spine

acromion

Name the actions of the trapezius

Elevates the scapula

Retracts the scapula

Depresses the scapula

Upwardly rotates the scapula

What is the trapezius innervated by?

Accessory nerve

Name the 2 attachments of the rhomboid major/minor

Medial border

Spinous process C7-T5

Minor: C7-T1 Major: T2-T5

Name the actions of the rhomboid major/minor

Elevation of the scapula

Retraction of the scapula

Downward rotation of the scapula

What is the rhomboid major/minor innervated by?

dorsal scapular nerve

Name associated peripheral nerve for suboccipital nerve

C1

Name associated peripheral nerve for greater occipital nerve

C2

Name associated peripheral nerve for dorsal scapular nerve

C5

Name associated peripheral nerve for axillary nerve

C5, C6

Name associated peripheral nerve for suprascapular nerve

C5, C6

Name associated peripheral nerve for accessory nerve

CN 11

Name associated peripheral nerve for thoracodorsal nerve

C6, C7, C8

Name the 2 attachments of the levator scapulae

Transverse process C1-C4

Superior angle of scapula

Name the actions of the levator scapulae

Elevation of the scapula

What is the levator scapulae innervated by?

Dorsal scapular nerve

Name the attachments of the latissimus dorsi

Spinous process T7-L5

Thoracolumbar fascia, iliac crest, inter tubercular groove of humerus

Name the actions of the latissimus dorsi

humeral extension

humeral medial rotation

humeral adduction

scapular downward rotation

What is the latissimus dorsi innervated by?

thoracodorsal nerve

What are the names of the erector spinae muscles from lateral-medial?(Hint: I Love Spaghetti)

Iliocostalis, longissimus, spinalis

Name the attachments for the 3 erector spinae muscles

Broad tendon from Sacrum

iliac crest

thoracolumbar fascia

spinous processes of vertebrae T11 - L5

ribs

cervical transverse processes, mastoid process

Name the actions for the erector spinae muscles (I love Spaghetti)

Back extension

Lateral flexion

What are the erector spinae muscles innervated by?

Dorsal Rami

Name the attachment for the suboccipital muscles (Triangle)

Between C1, C2, & skull

Name the actions for the suboccipital muscles

Neck extension

ipsilateral rotation of the neck

Ipsilateral side bending of the neck

What are the subocciptal (triangle) muscles innervated by?

Dorsal rami

Name the attachment for the splenius muscles

mastoid process to C3

Name the actions for the splenius muscles

head/neck extension

ipsilateral rotation of the neck

lateral flexion of the neck

What are the splenius muscles innervated by

Dorsal rami

Name the 2 attachments for the semispinalis muscles

Occipital bone

spinous process of cervical & thoracic regions

Name the actions for the semispinalis muscles

Back extension

Rotation

Stabilization

What are the semispinalis muscles innervated by?

Dorsal rami

Name the intermediate back muscles

serratus posterior superior/inferior

General muscle attachments and action of the intermediate back muscles?

ribs & vertebrae + assists with respiration

Name the attachments for the deltoid

Lateral 1/3 of clavicle

acromion

scapular spine

deltoid tuberosity (on humerus)

Name the actions of the deltoid

Flexion (anterior part)

abduction (middle part)

extension (posterior part)

external rotation (anterior part)

internal rotation (posterior part)

What are the deltoids innervated by?

Axillary nerve

Name the attachments of the infraspinatus

Infraspinous fossa

greater tubercle of humerus

Name the actions of the infraspinatus

External rotation

Stabilization

What is the infraspinatus innervated by?

Suprascapular Nerve

Name the attachments of the subscapularis

Subscapular fossa

Lesser tubercle of humerus

Name the actions of the subscapularis

Internal/medial Rotation

Adduction

Stablization

What is the subscapularis innervated by?

Superior & Inferior subscapular nerves

Name the attachments of the supraspinatus

Supraspinous fossa

greater tubercle of humerus

Name the actions of the supraspinatus

Abduction: Initiates and assists deltoid

Stabilizes

What is the supraspinatus innervated by?

suprascapular nerve

Name the attachments of the teres major

Inferior angle of scapula

Intertubercular groove of humerus

Name the actions of the teres major

Internal rotation of humerus

Adduction of humerus

Stabilizes

What is the teres major innervated by?

Inferior subscapular nerve

Name the attachments of the teres minor

Lateral border of scapula

Greater tubercle of humerus

Name the actions of the teres minor

External rotation of humerus

stabilizes

What is the teres minor innervated by?

Axillary nerve

What innervates the triceps brachii, long head

Radial Nerve

What are the actions of the triceps brachii, long head?

Extension of elbow & shoulder

Name the attachments of the triceps brachii, long head

Infraglenoid tubercle of scapula

olecranon of ulna