A&P 2 Unit 11 [Part 1] (Lab) [Muscles Part 1] Flashcards
Frontalis (Anterior View)
Frontalis (Lateral View)
Frontalis (Action)
- Raises eyebrows
- Wrinkles forehead horzontally
- Named for Location
Occipitalis (Posterior View)
Occipitalis (Lateral View)
Occipitalis (Action)
- Draws scalp posteriorly
- Named for Location
Orbicularis oculi (Anterior View)
Orbicularis oculi (Lateral View)
Orbicularis oculi (Action)
- Closes eyes (Squinting & Winking)
- Orbicularis= Fasicle direction
- oculi= eye
- Is a sphincter
Orbicularis oris (Anterior View)
Orbicularis oris (Lateral View)
Orbicularis oris (Action)
- Compresses, purses lips
- It is a Sphincter
- oris= mouth
*
Buccinator (Lateral View)
*
Buccinator (Anterior View)
*Buccinator (Action)
- Compresses cheeks
- Important in infants
- Refers to Buccal (Cheek)
Zygomaticus (Anterior View)
Zygomaticus (Lateral View)
Zygomaticus (Action)
- Elevates upper lips
- Elevates corners of mouth
- Named for Location: Zygomatic Bone
*
Temporalis (Lateral View)
*
Temporalis (Anterior View)
*Temporalis (Action)
- Elevates mandible (Chewing & Clenching Teeth)
- Named for Location
- Inserts on the medial side
*
Masseter (Lateral View)
*
Masseter (Anterior View)
*Masseter (Action)
Elevates mandible (Chewing & Clenching Teeth)
Platysma (Anterior View)
Platysma (Lateral View)
Platysma (Action)
- Tenses skin of neck
- Depresses mandible
*
Sternocleidomastoid (Anterior View)
*
Sternocleidomastoid (Lateral View)
*Sternocleidomastoid (Action)
- Bilaterally: Flexes the neck
- Unilaterally: Laterally flexes and rotates neck
- Sterno= sternum
- Cleido= clavicle
- Mastoid= mastoid process
*
Scalenes (Anterior View)
*Scalenes (Action)
- Elevate the ribs (For deep inhalation) OR flex the neck
*
Trapezius (Posterior View)
*Trapezius (Action)
- Superior Trapezius: Extends the neck
- Works with Splenius capitis
*
Splenius capitis (Posterior View) [Deep to Trapezius]
*Splenius capitis (Action)
- Bilaterally: Extends the neck
- Unilaterally: Rotates and laterally flexes the neck
- capitis= head
- Works with Trapezius
Longissimus thoracis (Posterior View) [Deep to Trapezius]
Longissimus thoracis (Action)
- Bilaterally: Extends vertebral column
- Unilaterally: Lateral flexion of vertebral column
- Tendon connects to back bones (Back movers)
*
Rectus Abdominis (Anterior View)
*Rectus Abdominis (Action)
- Flexes vertebral column
- Compresses abdomen (During breathing)
- Rectus= striaght up and down
*
External oblique (Lateral View)
*
Internal oblique (Lateral View)
*External and Internal obliques (Action)
- Flex vertebral column
- Compress abdomen
*
Transversus abdominis (Anterior View)
*
Transversus abdominis (Lateral View)
*Transversus abdominis (Action)
- Compresses abdomen (No vertebral flexion)
- Deepest of abes
External intercostals (Anterior View)
External intercostals (Action)
Elevate ribs
Internal intercostals (Anterior View) [Deep to External Intercostals]
Internal intercostals (Action)
Depress ribs
Diaphragm (Anterior View)
Diaphragm (Lateral View)
Diaphragm (Action)
- Expansion of thoracic cavity
- Compression of abdominal cavity
- Covers the liver
- Contracts= lowers