Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Ocular anatomy > Anatomical terms and the orbit > Flashcards

Anatomical terms and the orbit Flashcards

1
Q

What are the three anatomical planes

A

Sagittal plane
- divides the body into left and right halves

Cornal (fronal) plane
- divides the body into front and back halves

Transverse (horizontal) plane
- divides the body into upper and lower halves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Name the anatomical positions for front and back respectively

A

Anterior

Posterior

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Name the anatomical positions for above and below

A

Superior

Inferior

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Name the anatomica posistions for towards the temples and towards the nose

A

Temporal

Nasal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What does inter-(structure) mean

A

between

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What does intra- (structure) mean

A

within

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What does para-(structure) mean

A

Adjacent, immediately next o

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What does peri- (structure) mean

A

Around/ About

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is the orbit

A

Bony cavity of skull which surrounds and protects the eye and its appendages

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What are the seven bones of the orbit

A

Frontal
Zygomatic
Maxillary
Ethmoid
Sphenoid (greater and lesser wing)
Lacrimal
Palatine

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What are the four orbital wall

A

Roof
Floor
Medial
Lateral

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What bones make the roof of the orbital wall

A

Frontal and lesser wing sphenoid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What bone makes the lateral side of the orbital wall

A

Greater wing of spehnoid

Zygomatic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What bone makes the floor of the orbital wall

A

Maxillary

Zygomatic

Small contribution from palatine

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What bone makes the medial side of the orbital wall

A

Ethmoid

Lacrimal

Lesser wing of sphenoid

Maxillary

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is a foramen

A

An opening or orfice that transmits blood vessels, nerves and muscles to connect one part of the body to another

15
Q

what is a fissure

A

A groove, natural divsion, gap, or space which is caused by the incomplete union of two bones

15
Q

What is a fossa

A

A deperessed area that houses a structure

16
Q

What is a notch

A

Indentation at the edge of the bone

16
Q

What anatomical landmark(s) are present on the roof of the orbit

A

Supraorbital notch (formane)
- has supraorbital foramen, opening to transmit supraorbital nerves and vessels from the orbit onto the surface of the frontal bone

Lacrimal gland fossa
- houses lacrimal gland

Trochlear fossa
- point of attachment for the superior oblique muscle

16
Q

What anatomical landmark(s) are present in the medial wall

A

Lacrimal fossa
- houses the lacrimal sac

17
Q

What anatomical landmark(s) are present in the floor

A

Infraorbital foramen
- Transmits infraorbital nerve and vessels

18
Q

What anatomical landmark(s) are presesnt in the apex

A

Superior orbital fissure
- gap between lesser and greater wings of spehnoid
- has a common tendinous ring of 4 recti muslce (superior, medial, lateral, inferior rectus)
- transmits lacrimal, frontal, trochlear nerve and superior opthalmic vein

Inferior orbital fissure
- gap between greater wing sphenoid and maxillary bone
- transmits maxillary, zygotamic nerve, branches of pterygopalatine ganglion and inferior opthalmic vein

Optic foramen (canal)
- Opening in lesser wing spehnoid, medial to superior orbital fissure
- transmits optic nerve and artery

19
Q

What is the orbital fascia

A

connective tissue that envelops all the orbital contents

Associated with adipocytes and fats

20
Q

What is the function of the orbital fascia

A

To support and insulate orbital soft tissue structures

To assist with free, unimpeded movement of the eyeball

21
Q

What strutures does the orbital fascia comprise of

A

periorbita, orbital septum, Tenon’s capsule, mucle sheath, suspensory ligaments and check ligaments

22
Q

What is the periorbita

A

A conically shaped fibrous membrane that lines the orbital cavity, foramens, fissures and encloses the eyeball

23
Q

What is the function of the orbital septum

A

Membrane that separates the eyelids from the orbital contents so as to prevent the spread of haemorrhage and infection

24
Q

Give a description of the orbital septum

A

Perforated by blood vessels, nerves and the aponeurosis of the levator muscle

Is relatively week, may perforate, allowing prolapse of orbital fat or lacrimal gland

25
Q

What is the tenon’s capsule (bulbar fascia/ bulbar sheath)

A

External sheath enveloping sclera, seperated from the sclera (tenon’s space)

26
Q

What is the function of the muscle sheaths

A

Provide support for the nerve fibres and vessels

27
Q

What is the function of the muscle check ligments

A

Expansion of muscle sheaths, which probably restrains the activity of the muscle

28
Q

What is the function of suspensory ligaments

A

Support and prevent eyeball from dropping if orbital floor is damaged or removed

29
Q

What is the ocular media

A

A set of transparenteye structures, through which light passes before it reaches the retina.

30
Q

What does the ocular media consist of

A

PCTF

Cornea

Aqueous humour

Crystalline lens

Viterous humour

Ocular anatomy (15 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions