Main Lab 4- AOI's (Pectoral area and Superficial & Deep Neck)

Internal Obliques

A-Compression of abdomen, flexion, and rotation of trunk

O-Iliac crest

I-Ribs

BOTH

External Obliques

A-Compression of abdomen, flexion, and rotation of trunk

O-Ribs

I-Iliac crest

BOTH

Transverse abdominis

A-Compression of abdomen

O-Ribs and iliac crest

I-Linea Alba

HUMAN

Rectus abdominis

A-Fexion of trunk;compression of abdominal wall

O-Pubic crest

I-Xiphoid process and ribs (5-7)

BOTH

Intercostals external

A-Elevation and depression of ribs

O-Superior border of ribs

I-Inferior border of ribs

BOTH

Intercostals internal

A-Elevation and depression of ribs

O-Inferior border of ribs

I-Superior border of ribs

BOTH

Diaphragm

A-Opens thoracic cavity for lungs during inspiration

O-Ribs (5-10) and lumbar vertebrae

I-Central tendon

HUMAN

Frontalis

A-Raises eyebrows

O- Epicranial aponeurosis

I-Skin of eyebrows and root of nose

HUMAN

Occipitalis

A-Pulls scalp posteriorly

O-Occipital bone

I-Epicranial aponeurosis

HUMAN

Temporalis

A-Closes jaw; retracts mandible

O-Temporal fossa

I-Coronoid process (mandible)

HUMAN

Masseter

A-Closes jaw

O-Zygomatic arch

I-Angle and ramus (mandible)

BOTH

Zygomaticus

A-Elevates corners of mouth

O-Zygomatic bone

I-Corner of mouth

HUMAN

Buccinator

A- Compression of cheek

O- Molar region (maxilla and mandible)

I- Orbicularis oris

HUMAN

Platysma

A-Tenses skin of neck; depression of lower lip

O- Fascia of chest

I- Mandible and corner of mouth

HUMAN

Orbicularis oculi

A-Closes the eyes

O-Frontal bone and maxilla

I-Eyelids

HUMAN

Orbicularis oris

A-Closes and protrudes lips

O-Maxilla and mandible

I-Angles of mouth

HUMAN

Levator labii superioris

A-Elevation of upper lip

O-Zygomatic bone and infraorbital margin (maxilla)

I-Upper lip

HUMAN

Depressor labii inferioris

A-Depression of lower lip

O-Body of mandible

I-Lower lip

HUMAN

Sternocleidomastoid

A-Flexion and rotation of neck

O-Manubrium and clavicle

I-Mastoid process (temporal bone)

BOTH

Scalenes

A- Elevation of ribs 1 & 2; rotation of neck

O-Transverse processes of cervical vertebrae (C3-C7)

I-Ribs 1-2

BOTH

Serratus anterior

A-Abduction and rotation of scapula

O-True ribs

I-Medial border (scapula)

BOTH

Rhomboids

A-Adduction and elevation of scapula

O-Spinous processes of vertebrae (C7-T5)

I-Medial border (scapula)

BOTH

Spelnius

A-Rotation of head; extension of neck

O-Spinous process of vertebrae (C7-T6)

I-Temporal and occipital bone

BOTH

Digastric

A-Elevation of hyoid; opens mouth

O-Lower margin (mandible); mastoid process (temporal bone)

I-Hyoid bone

BOTH

Mylohyoid

A-Elevation of hyoid and floor of mouth

O-Medial surface (mandible)

I-Hyoid bone

BOTH

Geniohyoid

A-Elevation and protraction of hyoid bone

O-Mental tubercle

I-Hyoid bone

BOTH

Sternohyoid

A-Depression of hyoid and larynx

O-Manubrium (sternum)

I-Hyoid bone

BOTH

Sternothyroid

A-Depression of hyoid and larynx

O-Manubrium (Sternum)

I-Thyroid cartilage

BOTH

Thyrohyoid

A-Depression of hyoid; elevation of larynx

O-Thyroid cartilage

I-Hyoid bone

BOTH