Muscles: Group 1 Flashcards
What are the muscles of facial expression?
- Buccinator
- Orbicularis oris
- Zygomatic minor
- Zygomatic major
- Epicranius frontalis
- Epicranius occipitalis
- Obicularis oculi
Name the origin, insertion, and action of the:
Buccinator
Origin: maxilla and mandible
Insertion: orbicularis oris
Action: retracts angle of mouth, chewing
Name the origin, insertion, and action of the:
Orbicularis oris
Origin: maxilla and mandible
Insertion: skin around the mouth
Action: protrudes lips
Name the origin, insertion, and action of the:
Zygomatic minor
Origin: zygomatic bone
Insertion: skin of upper lip
Action: elevates corner of mouth (smile)
Name the origin, insertion, and action of the:
Zygomatic major
Origin: zygomatic bone
Insertion: corner of mouth
Action: draws angle of mouth upward (smile)
Name the origin, insertion, and action of the:
Epicranius frontalis
Origin: frontal bone
Insertion: epicranial aponeurosis
Action: wrinkles forehead and raises eyebrows
Name the origin, insertion, and action of the:
Epicranius occipilatis
Origin: occipital bone
Insertion: epicranial aponeurosis
Action: retracts scalp
Name the origin, insertion, and action of the:
Orbicularis oculi
Origin: frontal and maxillary bones
Insertion: eyelids
Action: closes eye (blinks)
What are the muscles of mastication?
- Temporalis
- Masseter
Name the origin, insertion, and action of the:
Temporalis
Origin: temporal fossa
Insertion: coronoid process of mandible
Action: elevates mandible
Name the origin, insertion, and action of the:
Masseter
Origin: zygomatic arch
Insertion: mandible
Action: elevates mandible
What are the muscles of the anterior neck?
Suprahyoid
- Mylohyoid
Infrahyoid
- Thyrohyoid
- Sternothyroid
- Sternohyoid
- Omohyoid
Name the origin, insertion, and action of the:
Mylohyoid
Origin: mandible
Insertion: hyoid bone
Action: elevates hyoid and floor of mouth
Name the origin, insertion, and action of the:
Thyrohyoid
Origin: thyroid cartilage
Insertion: hyoid bone
Action: depresses hyoid bone and elevates larynx
Name the origin, insertion, and action of the:
Sternothyroid
Origin: manubrium
Insertion: thyroid cartilage
Action: depresses larynx
Name the origin, insertion, and action of the:
Sternohyoid
Origin: manubrium and clavicle
Insertion: hyoid bone
Action: depresses hyoid
Name the origin, insertion, and action of the:
Omohyoid
Origin: scapula
Insertion: hyoid bone
Action: depresses hyoid
What is the muscle that moves the head and neck?
- Sternocleidomastoid
Name the origin, insertion, and action of the:
Sternocleidomastoid
Origin: manubrium and clavicle
Insertion: mastoid process
Action: rotates and flexes head
What are the muscles of the vertebral column?
- Erector spinae group (spinalis, longissimus, iliocostalis)
Name the origin, insertion, and action of the:
Spinalis, Longissimus, Ilicostalis
Origin: iliac crest, sacrum, vertebrae
Insertion: ribs, vertebrae, and mastoid process of temporal bone
Action: extends head, neck, and vertebral column
What are the muscles of respiration?
- Internal intercostal
- External intercostal
- Diaphragm
Name the origin, insertion, and action of the:
Internal intercostal
Origin: rib below
Insertion: rib above
Action: depresses ribs during exhalation
Name the origin, insertion, and action of the:
External intercostal
Origin: rib above
Insertion: rib below
Action: elevates ribs during inhalation
Name the origin, insertion, and action of the:
Diaphragm
Origin: inferior internal ribs 7-12
Insertion: central tendon
Action: expands thoracic cavity
What are the muscles of the abdominal wall?
- Transverse abdominis
- Internal abdominal oblique
- External abdominal oblique
- Rectus abdominis
Name the origin, insertion, and action of the:
Transverse abdominis
Origin: iliac crest and cartilage of lower 6 ribs
Insertion: linea alba
Action: compresses abdomen
Name the origin, insertion, and action of the:
Internal abdominal oblique
Origin: iliac crest and thoracolumbar fascia
Insertion: linea alba and lower and lower 4 ribs
Action: compresses abdomen; flexes and rotates vertebral column
Name the origin, insertion, and action of the:
External abdominal oblique
Origin: lower 8 ribs
Insertion: linea alba and iliac crest
Action: compresses abdomen; flexes and rotates vertebral column
Name the origin, insertion, and action of the:
Rectus abdominis
Origin: pubis
Insertion: cartilage of ribs 5-7 and xiphoid process
Action: flexes vertebral column and compresses abdomen
