Card Set Information

2012-02-07 11:47:33
cranial nerves

cranial nerves/practicum
Show Answers:

  1. Olfactory (I)
    • Sensory: Carries smell impulses from nasal mucous membrane to brain
    • Test: Smell impulse of coffee
  2. Optic (II)
    • Sensory: Carries visual impluses from eye to brain
    • Test: Visual Acuity check, Snellen Chart
  3. Oculomotor (III)
    • Motor: Contracts eye muscles to control eye movements (interior lateral, medial, and superior), constricts pupils,and elevates eyelidsids
    • Test: Cornea Light Reflex
  4. Trochlear (IV)
    • Motor: Contracts one eye muscle to control inferomedial eye movement
    • Test: Convergence
  5. Trigeminal (V)
    • Motor: Carries sensory impulses of pain, touch, and temperature from the face to the brain
    • Sensory: Influences clenching and lateral jaw movements (biting, chewing)
    • Test: Pricking areas (forehead, cheek, and jaw) with sharp and dull edges.
  6. Abducens (VI)
    • Motor: Control lateral eye movement
    • Test: Gazing
  7. Facial (VII)
    • Sensory: Contains sensory fibers for taste on anterior two thirds of tongue and stimulates secretions from salivaryglands (submaxillary and sublingual) and tears from lacrimal glands
    • Motor: Supplies the facial muscles and affects facial expressions (smiling, frowning, closing eyes)
    • Test: puffing of cheeks, wrinkling forehead, and clenching teeth
  8. Acoustic (VIII)
    • Sensory: Contains sensory fibers for hearing and balance
    • Test: Hearing based on conversation
  9. Glossopharyngeal (IX)
    • Sensory: Contains sensory fibers for taste on posterior third of tongue and sensory fibers of the pharynx that result in the “gag reflex” when stimulated
    • Motor: Provides secretory fibers to the parotid salivary glands; promotes swallowing movements
    • Test: ahhh or gag reflex
  10. Vagus (X)
    • Sensory: Carries sensations from the throat, larynx, heart, lungs, bronchi, gastrointestinal tract, and abdominal viscera
    • Motor: Promotes swallowing, talking, and production of digestive juices
    • Test: ahhh or gag reflex
  11. Accessory (XI)
    • Motor: Innervates neck muscles (sternocleidomastoid and trapezius) that promote movement of the shoulders andhead rotation. Also promotes some movement of the larynx
    • Test: Shrug Shoulder
  12. Hypoglossal (XII)
    • Motor: Innervates tongue muscles that promote the movement of food and talking
    • Test: Sticking out tongue