Showing posts with label Collections. Show all posts
Showing posts with label Collections. Show all posts

Sunday, January 25, 2009

- Some Types of prints.

- Really there are many types of prints which help

in identification of individuals allover the world,

especially in the field of forensic medicine and crimes.

- We will take a quick review about some of them:

1- Fingerprints..from here.

2-DNA fingerprinting...from here.

3-Foot prints:

- are the impressions or images left behind by a

person walking made by sole of the foot and


skin pattern of toes and heel.

- WE can collect important information from them

that helps tell about the person that left them behind.

-Information concerning the approximate height of the

person and possibly the walking habits of the person

are two pieces of information that can prove useful

in a criminal investigation.

4-palm prints.

5-Iris print (recognition):

-Are used to screen individuals who are trying to gain

access to more highly secure places or accounts,

not to scan the general public at random.

-By using camera technology, with subtle infrared

illumination reducing specular reflection from

the convex cornea, to create images of the detail-rich,

intricate structures of the iris. Converted into

digital templates, these images provide

mathematical representations of the iris that yield

unambiguous positive identification of an individual.

6-Retinal print:the same idea of iris.

6-Voice print:

-The fact that voice follows a particular pattern,

whatever the language spoken.

- The FBI is trying to develop a system that

could make your voice as unique and recognizable

as your fingerprint called FASR system.


7-Ear print:

Burglars often listen at windows and doors,

leaving an earprint behind, which, just like

a finger print, can be used to trace them.

Ears are unique in size, shape and structure.

Scientists use these traits to develop biometric

scans of the ear. In ear scans, a camera creates

an image of the ear that is analyzed for

identifying characteristics.

8-Thermal footprint:

our bodies emit thermal energy which by special systems

can recognize the persons after their presence

in some places e.g scene if the crimes.


9- Air sinus print:

Pattern of skull's frontal air sinuses ,Outline is

unique and comparisons with antemortem X-rays are useful.

10-Lip print:-

lip print identification is generally acceptable

within the forensic science as a means of positive

identification because it appears in the scene of the crime.


see you, Dr Ibrahim

Friday, September 5, 2008

- Cranial nerves.

**There are 12 cranial nerves...

  1. I      Olfactory nerve (purely sensory).
  2. II     Optic nerve  (purely sensory).
  3. III    Occulomotor nerve  ( Purely motor).
  4. IV    Trochlear  nerve  ( Purely motor).
  5. V     Trigeminal nerve ( Mixed ).
  6. VI    Abducent. ( Purely motor).
  7. VII   Facial  ( Mixed ).
  8. VIII  Auditory nerve  (Vestibulocochlear) (purely sensory).
  9. IX    Glossopharyngeal  ( Mixed ).
  10. X     Vagus  ( Mixed ).
  11. XI    Spinal Accessory.( Mixed ).
  12. XII   Hypoglossal .( Mixed ).

** Important notes:-
- The largest cranial nerve .... CN V (Trigeminal).
- Cranial nerves responsible for eye movements are
  •    III (Oculomotor)
  •    IV (Trochlear)
  •    VI (Abducens)

- The longest cranial nerve ....CN X (Vagus) which reaches from the medulla to the digestive and urinary organs.


- CN I and II are  attached to Cerebrum.


See you ,
Ibrahim

Wednesday, August 20, 2008

- Three in nervous system.

* Brain is composed of three parts :-
  1. Cerebrum.
  2. Cerebellum.
  3. Brain stem.

* Brain stem is composed of three parts :-
  1. Midbrain.
  2. Pons.
  3. Medulla oblongata.
To be continued ....

Sunday, August 3, 2008

- Eggs in Medical parasitology 2.

Colour of helminthic eggs :-

** yellowish brown eggs:-

eggs of



- Fasciola hepatica .

- Fasciolopsis buski .

- Fasciola gigantica .

- Heterophyes heterophyes.

- Hymenolepis diminuta.

- Metagonimus yokogawai.

- Diphyllobothrium latum .

- Diphyllobothrium mansoni .

- Dipylidium caninum .

- Trichuris trichiura .

- Capillaria philippinensis.

------------------

** Golden brown eggs:-

eggs of


- Paragonimus westermani.

- Ascaris lumbricoides.

------------------

** Dark brown eggs:-

eggs of - Toxocara species.

------------------

** Brown eggs :-

eggs of


- Taenia solium .

- Taenia saginata .

- Taenia multiceps .

- Echinococcus granulosus .

------------------

** Transparent eggs :-

eggs of


- Shistosoma mansoni.

- Shistosoma Japonicum.

- Shistosoma haematobium.

- Trichostrongylus colubriformis.

------------------

** Colouless eggs :-

egg of


- Hymenolepis nana.

- Strongyloides stercoralis.

- Hookworms.

- Enterobius vermicularis.

===========================

- Content Of the eggs :-

** Immature eggs (no embryo ) :-

eggs of


- Fasciola hepatica .

- Fasciolopsis buski .

- Fasciola gigantica .

- Diphyllobothrium latum .

- Diphyllobothrium mansoni .

- Trichuris trichiura .

- Capillaria philippinensis.

- Hookworms.

- Trichostrongylus colubriformis.

- Paragonimus westermani.

------------------

** Mature eggs (contain embryo ) :-

eggs of


- Heterophyes heterophyes.

- Shistosoma mansoni.

- Shistosoma Japonicum.

- Shistosoma haematobium.

- Taenia solium .

- Taenia saginata .

- Taenia multiceps .

- Echinococcus granulosus .

- Hymenolepis diminuta.

- Hymenolepis nana.

- Dipylidium caninum .

- Enterobius vermicularis.

- Strongyloides stercoralis.

===========================

- operculated eggs :-

eggs of


- Fasciola hepatica .

- Fasciolopsis buski .

- Fasciola gigantica .

- Heterophyes heterophyes ( operculated at

one pole & has a knob at the other pole ).

- Paragonimus westermani( flat operculum ) .

- Diphyllobothrium latum .

- Diphyllobothrium mansoni .

- Capillaria philippinensis.

===========================

- eggs of Shistosoma :-

- Shistosoma mansoni.

has lateral spine.

- Shistosoma Japonicum.

has lateral &short curved spine.

- Shistosoma haematobium.

has terminal spine.

- Eggs in Medical parasitology.

- when we asked about diagnosis of parasites

we may say that the diagnostic material is eggs

then we must say the characters of eggs

for example :-

Q laboratory diagnosis of fasciola gigantica ?

Answer:- examination of the stool for the characteristic

egg which has the following characters....?....

- when we talk about any egg of helminthes you must

comment on 6 items

4 s ...- size -shell - shape

- special characters

2c ....-content (contain embryo or not)

- colour
===========================
** Size & shape of helminthic eggs :-

-140 x 70 micro meter (oval in shape)

egg of

- Fasciola hepatica .

- Fasciolopsis buski .

- Shistosoma mansoni.
------------------
-180 x 90 micro meter (oval in shape)

egg of - Fasciola gigantica .
------------------

-30 x 15 micro meter (oval in shape)

egg of :

- Heterophyes heterophyes.

- Metagonimus yokogawai.
------------------
-100 x 50 micro meter (oval in shape)

egg of :

- Shistosoma Japonicum.

- Paragonimus westermani.
------------------
-120 x 60 micro meter (oval in shape)

egg of - Shistosoma haematobium.
------------------
- 70 x 45 micro meter (oval in shape)

egg of:

- Diphyllobothrium latum .

- Diphyllobothrium mansoni .

- Fertilized egg of Ascaris lumbricoides .
------------------
- 40 micro meter (rounded in shape)

egg of:

- Taenia solium .

- Taenia saginata .

- Taenia multiceps .

- Echinococcus granulosus .
------------------
- 30 x50 micro meter ( oval in shape)

egg of - Hymenolepis nana.
------------------
- 60 x40 micro meter ( oval with rounded poles)

egg of - Ancylostoma duodenale.
------------------
- 60 x80 micro meter ( oval in shape

egg of - Hymenolepis diminuta.
------------------
- 25 x40 micro meter ( spherical in shape)

egg of -Dipylidium caninum .
------------------
- 90 x45 micro meter ( oval in shape)

egg

- unFertilized egg of Ascaris lumbricoides .

- Trichostrongylus colubriformis.
------------------
- 85 x75 micro meter ( oval in shape)

egg of - Toxocara species.
------------------
- 50 x25 micro meter

egg of

- Enterobius vermicularis
( planoconvex (D shaped).)

- Trichuris trichiura (barrel shaped)
------------------
- 45 x20 micro meter ( oval in shape)

egg of - Capillaria philippinensis.
------------------
- 55 x30 micro meter ( oval in shape)

egg of - Strongyloides stercoralis.
===========================
** Shell of the eggs :-

- Eggs with thin shell:-

egg of

- Fasciola hepatica .

- Fasciolopsis buski .

- Fasciola gigantica .

- Shistosoma mansoni.

- Shistosoma Japonicum.

- Shistosoma haematobium.

- Hookworms.

- Strongyloides stercoralis.

- Trichostrongylus colubriformis.
------------------
- Eggs with thick shell:-

egg of

- Heterophyes heterophyes.

- Diphyllobothrium latum

- Diphyllobothrium mansoni

- Trichuris trichiura .

- Capillaria philippinensis.

- Paragonimus westermani.
-------------------

shell of

-Taenia solium .

- Taenia saginata .

- Taenia multiceps .

- Echinococcus granulosus

is composed of inner shell (thick radially striated

embryophore ) & outer shell (thin membranous)




------------------
- shell of
Hymenolepis nana.

is composed of inner layer (embryophore )

& outer layer (thin membranous)

the shell is provided with bipolar knobs & filaments

(4-8) at each pole.





------------------
- shell of
Hymenolepis diminuta.

similar to Hymenolepis nana without filaments
------------------

- shell of Dipylidium caninum.

thin shell & is composed of 2 layers &separated

by transparent albuminous material .
------------------

- shell of Enterobius vermicularis.

double walled & a 3rd outer thin albuminous sticky

layer.