KINESIOL 1A03 Lecture Notes - Lecture 12: Superior Rectus Muscle, Ciliary Body, Optic Nerve

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1 Dec 2014

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Accessory structures: eyebrows, eyelids, palpebrae, palpebral fissure, canthi, caruncle, conjunctiva, palpebral, bulbar. Anatomy of the eye: comprised of 3 coats (tunics), fibrous tunic (white of the eye, sclera shape, protection, attachment of muscles, continuous with the cornea. Anatomy of the eye: vascular tunic, choroid blood supply, anterior ciliary body and iris. Innermost layer of the eye: cones (6-7m) and rods (120m) Visual system: retina, light focused on the fovea and macula visual acuity, fovea centralis. Cones: macula more cones than rods. Retinal vessels: optic disc nerve and blood supply enter the eye blind spot. Visual system: retina, outer pigmented layer. Ciliary muscles in the ciliary body are relaxed. Ciliary muscles in the ciliary body contract, moving ciliary body toward lens. 3 events to bring an image into focus: accommodation ciliary muscles contract lens becomes more spherical greater light refraction. Focused object: pupil constriction depth of focus pupil diameter small greater depth of focus.

Related Questions

1. Which of the following represents the most likely location of sensory receptors that monitor internal body temperature and serum osmolarity?

a. Carotid bodies

b. Hypothalamus

c. Solitary nucleus

d. Nucleus ambiguus

e. Anterolateral medulla

2. A reduction in activity in the fibers ascending in the lateral lemniscus to the inferior colliculus that would contribute to changes in peak IV of the auditory brain response (ABR) would not be related to damage to which of the following structures?

a. Anterior cochlear nucleus

b. Posterior cochlear nucleus

c. Medial superior olivary nucleus

d. Lateral superior olivary nucleus

e. Medial geniculate nucleus

3. The peripheral receptors of the vestibular system lie in five separate organs for each inner ear, including three semicircular canals and two otolith organs. The three semicircular canals are responsible for the transduction of what?

a. Linear accelerations of the head in the horizontal plane

b. Rotational head motion

c. Tilts of the head relative to gravity

d. Static head position

e. Up-down head motion aligned with gravity

4. The receptor cells of the vestibular system are termed hair cells. Signal transduction in the hair cell results from a cascade of several events. Initially, when movement occurs, stereocilia are deflected. For excitatory signal transduction in hair cells, which of the following series of events is correct?

a. The stereocilia are compressed toward the cell surface by acceleration forces, K+ channels in the stereocilia close, Ca2+ channels in the basolateral cell membrane close, and excitatory neurotransmitter is released

. b. The stereocilia are bent away from the kinocilium, K+ channels in the stereocilia close, Ca2+ channels in the basolateral cell membrane close, and excitatory neurotransmitter is released.

c. The stereocilia are rigid and do not move, endolymph motion forces the K+ channels in the stereocilia open, Ca2+ channels in the basolateral cell membrane close, and excitatory neurotransmitter is released.

d. The stereocilia are bent toward the kinocilium, K+ channels in the stereocilia open, Ca2+ channels in the basolateral cell membrane open, and excitatory neurotransmitter is released.

e. The stereocilia are bent perpendicular to the kinocilium, K+ channels in the stereocilia close, Ca2+ channels in the basolateral membrane open, and excitatory neurotransmitter is released.

5. Which of the following innervates the superior, medial and inferior rectus muscles of the eye and is a constrictor of the pupil?

a. Trochlear

b. Abducens

c. Oculomotor

d. Trigeminal

e. Facial

This is lab practical questions for Anatomy&physiology I class.

1. If you flex your big toe, what muscle is named for that action?

2. Name a muscle that inserts on the metatarsals and cuneiforms.

3. The most superficial muscle in the gluteal group is the _______.

4. Name an action of the gluteal group.

5. Name the long muscle that originates on the anterior, superior iliac spine.

6. In anatomical position, the ulna is (medial/lateral) to the radius.

7. What part of the ilium does the sciatic nerve run through?

8. If a muscle originated on the posterior, inferior surface of the femur, and inserted on the posterior surface of the calcaneous bone, what kind of action might be produced? 9. Come up with a hypothetical origin and insertion of a muscle that would cause flexion at the hip

10. The fibulae contain the ______ malleoli, while the tibias contain the ______ malleoli.

jadeduck36

Answer questions related to a Diagnostic Report LEFT WRIST - PA, oblique, and lateral views of the left wrist reveal a transverse fracture of the distal radius, just proximal to the epiphysis. The distal fragment is displaced and angulated posteriorly at approximately 15 degrees. The articular surface of the radius is not involved. There is soft tissue swelling adjacent to the fracture site, particularly on the dorsal aspect. No other abnormalities are noted. Impression: Colles fracture, left wrist Questions: 1. Which end of the radius was fractured? The end closest to the wrist or the end nearest the elbow? Which sentence tells you that? 2. Was the bone displaced backwards or forwards? 3. What is the articular surface of the radius? Define articular. 4. What is the dorsal aspect? 5. Define: a. PA view b. oblique view c. lateral view d epiphysis ** NEED ALL Five ANSWERS**

KINESIOL 1A03 Lecture Notes - Lecture 12: Superior Rectus Muscle, Ciliary Body, Optic Nerve

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