3 rd Week Dec 2010 Anatomy's Quiz

Bismillah...Can you lend me only 10 minutes for this questions...realizing that this facts are vital and quite interesting...so, let us at least revised them...~wasalam

Larynx

1. Muscle that adduct the vocal cord : a)................., b)....................., c).....................
2. Muscle that abduct the vocal cord :-  Name : ...................., Origin : ............, Insertion : ...............
3. Nerve supply of larynx :- a).................................., b)....................................... 

Answer :

1) Lat. CricoArytenoid muscle, Transverse Arytenoid muscle, CricoThyroid muscle

2) Post. CricoArytenoid muscle, origin: post. surface of cricoid lamina, insertion: post. surface of muscular process of arytenoid cartilage. 

3) Recurrent laryngeal N (motor: all larynx muscles EXCEPT cricothyroid, sensory: mucosa larynx below vocal cords), Superior laryngeal N (Ext. laryngeal N: cricothyroid, Int. laryngeal N: mucosa larynx above vocal cords and epiglottis)

Spinal cord

1. Site : .....................................
2. Begin : ....................................., 
3. End: ..........................................
4. Fixation : a) ...............,b) ................., c) .....................d) .....................
5. Changes in length according to age : 

• By 3 rd month of intra- uterine life : .......................................................
• At birth : ......................................................................
• In adult : ....................................................................

Answers :

1) upper 2/3 of vertebral canal

2) lower border of foramen magnum (continuation of medulla oblongata),

3) lower border of L1 vertebra  (level of discs between L1/L2 vertebrae)

4) filum terminal, denticulate lig, subarachnoid septum, dura mater

5) equal length to vertebral column, ends at level of L3 vertebra, ends at level between L1/L2 vertebrae