Lab 5 AOIs Flashcards
Obliques (external and
internal) muscle group and action
*group: abdominal wall
*Compression of
abdomen, flexion and
rotation of trunk
Obliques (external and
internal) Origin
Ribs (external), Iliac crest
(internal)
Obliques (external and
internal) Insertion and human or cat
Iliac crest (external), Ribs
(internal)
* both
Transverse abdominis muscle group and Action
*origin: Abdominal wall
*Compression of abdomen
Transverse abdominis Origin
Ribs and iliac crest
Transverse abdominis Insertion and H or B
*Linea alba
*Human
Rectus abdominis Muscle group and Action
*group: Abdominal wall
* Flexion of trunk;
compression of
abdominal wall
Rectus abdominis origin
Pubic crest
Rectus abdominis insertion and H or B
*Xiphoid process and ribs
(5-7)
*Both
Intercostals (external and
internal) muscle group and action
- Breathing muscles
*Elevation and depression
of ribs
Intercostals (external and
internal) origin
Superior border of ribs
(external); Inferior border
of ribs (internal)
Intercostals (external and
internal) insertion and H or B
*Inferior border of ribs
(external); Superior
border of ribs (internal)
*Both
Diaphragm muscle group and Action
Opens thoracic cavity for
lungs during inspiration
Diaphragm Origin
Ribs (5-10) and lumbar
vertebrae
Diaphragm Insertion and H or B
*Central tendon
*Human
Frontalis Muscle group and Action
Raises eyebrows
Frontalis Origin
Epicranial aponeurosis
Frontalis Insertion and H or B
*Skin of eyebrows and
root of nose
*Human
Occipitalis Muscle group and Action
*group: Muscles of scalp
*Pulls scalp posteriorly
Occipitalis Origin
Occipital and temporal
bones
Occipitalis Insertion and H orB
*Epicranial aponeurosis
*Human
Temporalis Muscle group and Action
*muscle group: Mastication
Closes jaw; retracts
mandible
Temporalis origin
Temporal fossa
Temporalis Insertion and H or B
Coronoid process
(mandible)
*Human
Masseter Muscle group and Action
Muscle Group: Mastication
Action: closes jaw
Masseter Origin
zygomatic arch
Masseter Insertion and H or B
*angle and ramus (mandible)
*BOTH
Pterygoids (medial and lateral) Muscle group and Action
Muscle Group: Mastication
Action: protrusion and side-to-side movement of jaw
Pterygoids (medial and lateral) Origin
Origin: Lateral pterygoid plate (sphenoid bone)
Pterygoids (medial and lateral)
Insertion: Mandibular condyle
*HUMAN
Zygomaticus Muscle group and Action
Muscle Group: Facial Expression
Action: elevates corners of mouth
Zygomaticus origin
Origin: zygomatic bone
Zygomaticus Insertion and H or B
Insertion: Corner of mouth
*HUMAN
Buccinator Muscle group and Action
Muscle Group: Facial Expression
Action: Compression of cheek
Buccinator Origin
Origin: Molar region (maxilla and mandible)
Buccinator
Insertion: Orbicularis Oris
*HUMAN
Platysma Muscle group and Action
Muscle Group: Facial Expression
Action: Tenses skin of neck; depression of lower lip
Platysma origin
Origin: fascia of chest
Platysma Insertion and H or B
Insertion: mandible and corner of mouth
*HUMAN
orbicularis oculi Muscle group and Action
Muscle group: Facial Expression
Action: Closes eyes
orbicularis oculi origin
Origin: Frontal Bone and maxilla
orbicularis oculi Insertion and H or B
Insertion: Eyelids
HUMAN