Comparison between tract and nerve

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  Comparison between tract and nerve Nerve Nerve contain bundle of axons (nerve fibers) in the peripheral nervous system (PNS) that transmits signals between the central nervous system (CNS) and other parts of the body. It is the most important part of peripheral nervous system Location: Peripheral nervous system. Structure: Made of axons, connective tissue layers (endoneurium: axon is surrounded by it , perineurium: bundle of axons are surrounded by it, epineurium: whole nerve trunk is surrounded by it), and blood vessels. It gets myelination by Schwann cell   Function: Carries sensory signals to the CNS (afferent) from peripheral part of body or motor signals carry from from the CNS (efferent) to target organs like skeletal muscle, cardiac muscle, smooth muscle or glands Example: Sciatic nerve, median nerve, except optic nerve (though optic nerve is technically part of CNS in develop...
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Difference between male and female clavicle

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Difference between male and female clavicle
·         They are one of the bones used for sex determination especially in cases where only skeletal remains are available for forensic identification.    
·         Both metric (physical dimensions) and non-metric (characteristic appearance) features of the clavicle can have a decisive role in forensic identifications.   

·         The clavicle measurements or metric features include the weight (W), linear length (L), anterior curved length (ACL), posterior curved length (PCL), mid-clavicular circumference (MC), medial 2/3rd and lateral 1/3rd junction circumference (JC), and mid-clavicular anteroposterior diameter  (APD).   


·         Non-metric features include the subclavian groove, nutrient foramen and ‘type’ of the clavicle, etc. 
Male clavicle
Female clavicle
Longer
Shorter
Thicker
Thinner
More curved
Less curved
Rough
Smooth
More heavy
Light in weight
Mid-shaft circumference is more in male
Mid-shaft circumference is less in female
Acromial end is higher than the sternal end
Acromial end is lower than the sterna end
It contains large subclavian groove
It contains small subclavian groove
Nutrient foramen may be larger
Nutrient foramen may be smaller
The type of clavicle ‘long and robust’
The type of clavicle ‘small and smooth’
the main significant features of the male clavicle are its higher mid clavicular circumference (34.87 mm), linear length (141.30 mm), posterior curved length (151.65 mm), and medial 2/3 and lateral 1/3 junction circumference (40.50 mm).
it has lesser values in midclavicular circumference (28.67 mm), linear length (125.71 mm), posterior curved length (134.36 mm), and medial 2/3 and lateral 1/3 junction circumference (34.93 mm).
*Rhomboid fossa is more prominent in male
Rhomboid fossa is less prominent in female
Perforations within the bone are more in male
Perforations within the bone are less in female
Sternal diameter is more in male
Sternal diameter is less in female
Acromial end diameter is more in male
Acromial end diameter is less in female
Conoid diameter is more in male
Conoid diameter is less in female
Lateral angle, medial angle & total angle is more in male clavicle  
Lateral angle, medial angle & total angle is less in female clavicle  
Males activity were better related with the combination of different lengths, diameters and indices
Angles were found good indicators of activity in females.
Male clavicles are more asymmetrical than the female
Female  clavicles are less asymmetrical than the male
Steranal diameter of male clavicle is less asymmetry than the female
Steranal diameter of female clavicle is more asymmetry than the male
·         The rhomboid fossa is a normal concave lucent irregularity that may be seen along the inferomedial aspect of the clavicle. It is the insertion site of the costoclavicular ligament. 

·         The main difference between male and female clavicle is their anatomical features, such as size and shape. 

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