Tulane Som - Block 1 - Gross Anatomy

Front 1

Trapezius

Back 1

Sensory: C3-C4 | Motor: Spinal Accessory Nerve (CN XI)

Adducts, rotates, elevates, and depresses the scapula; Abducts the upper limb

Front 2

Levator Scapulae

Back 2

Dorsal Scapular n.


Elevates the scapula, rotates the glenoid cavity

Front 3

Rhomboid Major

Back 3

Dorsal Scapular n.



Adducts and medially rotates scapula

Front 4

Rhomboid Minor

Back 4

Dorsal Scapular n.



Adducts and medially rotates scapula

Front 5

Latissimus Dorsi

Back 5

Thoracodorsal n.


{Ski pole}{Oh my god} Extend glenohumeral joint, medially rotates humerus, adducts upper limb

Front 6

Serratus Posterior Superior

Back 6

Intercostal n. T1-T4 "First 4"



Elevates the ribs (INHALATION)

Front 7

Serratus Posterior Inferior

Back 7

Intercostal n. T9-T12 "Last 4"



Elevates the ribs (EXHALATION)

Front 8

Splenius

Back 8

Dorsal rami of middle cervical spinal nerves


Acting with opposite partners, extend head and neck. Unilaterally: laterally bend head and neck to side of contraction. Act synergistically with opposite sternocleidomastoid

Front 9

Semispinalis

Back 9

Dorsal primary Cervical


Extends head, rotates head so face turns toward opposite side, maintains vertebral posture and vertebral column movement

Front 10

Obliquus capitis superior

Back 10

Suboccipital nerve (dorsal primary ramus of C1)


Laterally flexes the atlanto-axial joint

Front 11

Obliquus capitis inferior

Back 11

Suboccipital nerve (dorsal primary ramus of C1)


Rotates the atlanto-axial joint

Front 12

Rectus capitis posterior major

Back 12

Suboccipital nerve (dorsal primary ramus of C1)


Extends and rotates the atlanto-occipital joint

Front 13

Iliocostalis "I"

Back 13

Dorsal primary rami C4-S5


Erector spinae together extend vertebral column and head. Unilaterally: bend vertebral column laterally toward active side. Maintain vertebral posture

Front 14

Longissimus "LOVE"

Back 14

Dorsal primary rami C1-S1


Erector spinae together extend vertebral column and head. Unilaterally: bend vertebral column laterally toward active side. Maintain vertebral posture

Front 15

Spinalis "SEX"

Back 15

Dorsal primary rami C2-L3


Erector spinae together extend vertebral column and head. Unilaterally: bend vertebral column laterally toward active side. Maintain vertebral posture

Front 16

Sternocleidomastoid

Back 16

Spinal Accessory Nerve (CN XI)


Draws mastoid down towards one side of contraction causing chin to turn up towards opposite side

Front 17

Omohyoid

Back 17

Ansa cervicalis C1-C3


Depresses/stabilizes hyoid bone

Front 18

Platysma

Back 18

Facial Nerve (CN VII)


Draws down corners of mouth, aids in depression of mandible

Front 19

(?) Subclavius

Back 19

Nerve to subclavius

Draws the clavicle (and shoulder) down and forward

Front 20

(?) Anterior Scalene

Back 20

Brachial plexus (local ventral rami)


Flexes and laterally bends the neck, elevates the first rib

Front 21

(?) Middle Scalene

Back 21

Brachial plexus (local ventral rami)


Flexes and laterally bends the neck, elevates the first rib

Front 22

(?) Posterior Scalene

Back 22

Brachial plexus (local ventral rami)


Flexes and laterally bends the neck, elevates the second rib

Front 23

Supraspinatus

Back 23

Suprascapular n.

Strengthens shoulder joint by drawing humerus toward the glenoid fossa. With deltoid, initiates abduction at shoulder and is a lateral rotator of humerus

Front 24

Infraspinatus

Back 24

Suprascapular n.


Strengthens shoulder join by bracing head of humerus in glenoid fossa. Lateral rotator of humerus.

Front 25

Teres major

Back 25

Lower subscapular n.

Extends arm from flexed position, adducts and medially rotates arm at shoulder.

Front 26

Teres minor

Back 26

Axillary n.


Rotates arm laterally and weakly adducts the arm at shoulder. Draws humerus toward glenoid fossa.

Front 27

Deltoid

Back 27

Axillary n.

Abducts arm, medially rotates and laterally rotates arm

Front 28

Triceps Brachii

Back 28

Radial n.

Extend forearm at elbow, extend humerus at shoulder joint