PHYSIOLOGY DEPARTMENT

Ass. Prof. VASTYANOV Rooslan

SENSORY SYSTEMS #2SENSORY SYSTEMS #2

PHYSIOLOGY OF VISION

PLEASE,

MOBILESSHOULDBE OFF

GENERAL STRUCTURE OF ANALYZERS

- RECEPTOR CELLSPERIFERAL PART

CONDUCTIVE PART

CENTRAL PART

- CONDUCTIVE WAYS

- Subcortical structures and cortical areas

Eye Anatomy #1Muscles

Eye Anatomy #1Muscles

Tear inflow and drainage Tear inflow

and drainage

Eye Anatomy #2Blood supply

Eye Anatomy #2Blood supply

Eye Anatomy #3Extrinsic eye muscles, cranial nerve innervation

and eyeball movement

Eye Anatomy #3Extrinsic eye muscles, cranial nerve innervation

and eyeball movement

Eye Anatomy #4Transverse ViewEye Anatomy #4Transverse View

Eye Anatomy #4Lens

Eye Anatomy #4Lens

The inflow and drainage of an aqueous liquidThe inflow and drainage of an aqueous liquid

The scheme of accommodationThe scheme of accommodation

Accommodation occurs

by a reflex that has

three components:

Accommodation occurs

by a reflex that has

three components:

(i) Bulging the lens. Contraction of the ciliary muscles releases the tension of the zonular fibers. The elastic capsule surrounding the lens retracts, increasing the convexity (and thus the power) of the lens

(i) Bulging the lens. Contraction of the ciliary muscles releases the tension of the zonular fibers. The elastic capsule surrounding the lens retracts, increasing the convexity (and thus the power) of the lens

(ii) Pupillary constriction. By reducing the area through which light can enter the eye spherical aberration s reduced that follows by depth of the focusincreasing

(ii) Pupillary constriction. By reducing the area through which light can enter the eye spherical aberration s reduced that follows by depth of the focusincreasing

(iii) Eyes convergence in order to both eyes were focused on the object.(iii) Eyes convergence in order to both eyes were focused on the object.

The function of the retina is to receive visual images, partially analyze them and transmit this modified

information to the brain.

The function of the retina is to receive visual images, partially analyze them and transmit this modified

information to the brain.

Photosensor distribution, sensitivity in darkness and visual acuity of the retina

Photosensor distribution, sensitivity in darkness and visual acuity of the retina

PHOTOSENSORSPHOTOSENSORS

THE SCHEME OF CHAIN REACTION OF PHOTOSENSORS ACTIVATION IN LIGHT AND IN THE DARKNESS

THE SCHEME OF CHAIN REACTION OF PHOTOSENSORS ACTIVATION IN LIGHT AND IN THE DARKNESS

THE SUMMARIZED SCHEME OF THE RODS ELECTRICALREACTIONS IN LIGHT AND IN THE DARKNESS

THE SUMMARIZED SCHEME OF THE RODS ELECTRICALREACTIONS IN LIGHT AND IN THE DARKNESS

The Layers ofthe Retina

The Layers ofthe Retina

The Pigment Layer of the Retina

The Pigment Layer of the Retina

Optic System of the EyeOptic System of the Eye

The schematized explanation of thespectrum nature

The schematized explanation of thespectrum nature

The adequate stimulus for human visual receptors is light, which may be defined as electromagnetic radiation between the wave lengths

of 770 nm (red) and 380 nm (violet).

The adequate stimulus for human visual receptors is light, which may be defined as electromagnetic radiation between the wave lengths

of 770 nm (red) and 380 nm (violet).

Rods and cones physiological

sensitivity

Rods and cones physiological

sensitivity

The scheme illustrating some fundamental optic principles

The scheme illustrating some fundamental optic principles

The schemes illustrating normal eye refraction (a)

myopia (b) and hypermetropia (c)

The schemes illustrating normal eye refraction (a)

myopia (b) and hypermetropia (c)

THE SCHEME OF THE VISUAL PATHWAY AND VISUAL FIELD DEFICITS

THE SCHEME OF THE VISUAL PATHWAY AND VISUAL FIELD DEFICITS

CORTICAL LOCALIZATION OF THE VISUAL, VISUAL ASSOCIATION, AUDITORY AND

AUDITORY ASSOCIATION AREAS (lateral view)

CORTICAL LOCALIZATION OF THE VISUAL, VISUAL ASSOCIATION, AUDITORY AND

AUDITORY ASSOCIATION AREAS (lateral view)