Shoulder Hump:

The hump is where a mass of muscles attach to the bear's backbone and give the bear additional strength for digging.

U.Arctos : Present

G.Beringei : Absent

Edge : U.Arctos

Scapula Width Index:

It's scapula width/length ratio.Higher score indicates greater attachment of muscles involved in stabilizing the shoulder joint during arm movements (supraspinatus,infraspinatus, subscapularis).

U.Arctos : 87%

G.Beringei : 133%

Edge : G.Beringei 

HRI:

It is humerus mediolateral diameter at mid-shaft/humerus length.Robust forelimb bones protect the animal from violent stresses during grappling.

U.Arctos : 11%

G.Beringei : 8%

Edge : U.Arctos

HRI2:

It is humerus anteroposterior diameter at mid-shaft/humerus length. Robust forelimb bones protect the animal from violent stresses during grappling.

U.Arctos : 11%

G.Beringei : 7%

Edge : U.Arctos

Forelimb Proportion Index:

Higher score Indicates greater degree of morphological specialization for producing large out-forces in the forelimb.  

U.Arctos : 117%

G.Beringei : 125%

Edge : G.Beringei 

HEI:

The HEI index measures the relative size of wrist stabilizing muscles and well as several grasping muscles in area which facilitate prey grasping. These muscles also likely help stability, pushing, and agility when legs are on ground.

U.Arctos : 30%

G.Beringei : 23%

Edge : U.Arctos

HDWI:

It is Humeral distal width/Humeral length ratio, correlated with resistance to stresses at the elbow joint. A higher score also increases muscle attachement.

U.Arctos : 28%

G.Beringei : 15%

Edge : U.Arctos

RRI:

This measures radius mediolateral diameter at midshaft divided by radius length. As mentioned above for humerus robusticity, a robust radius resists stresses on bones during fights and increases resistance to bites to the forelimb.

U.Arctos : 10%

G.Beringei : 6%

Edge : U.Arctos

RRI2:

This measures radius anteroposterior diameter at midshaft divided by radius length. As mentioned above for humerus robusticity, a robust radius resists stresses on bones during fights and increases resistance to bites to the forelimb.

U.Arctos : 6%

G.Beringei : 5%

Edge : U.Arctos

OMA:

Higher score Indicates greater anatomical mechanical advantage of triceps brachii, the main extensor of the elbow. 

U.Arctos : 20%

G.Beringei : 12%

Edge : U.Arctos

Styloid Width Index:

 Higher score Indicates greater relative robusticity of distal forelimb.

U.Arctos : 33%

G.Beringei : 22%

Edge : U.Arctos

 

Studies Used For The Above Comparison:

 

https://www.researchgate.net/publication/280973278_Carnivoran_postcranial_adaptations_and_their_relationships_to_climate

 

 

https://www.researchgate.net/publication/230843015_Postcranial_morphology_and_the_locomotor_habits_of_living_and_extinct_carnivores

 

https://www.researchgate.net/publication/331908856_Sexual_dimorphism_in_postcranial_skeletal_shape_suggests_male-biased_specialization_for_physical_competition_in_anthropoid_primates

 

 

 

https://www.researchgate.net/publication/20806549_Differential_scaling_of_the_long_bones_in_the_terrestrial_carnivora_and_other_mammals

 

https://pubmed.ncbi.nlm.nih.gov/9403078/

 

 

https://www.researchgate.net/publication/247494638_Ecomorphology_of_the_giant_short-faced_bears_Agriotherium_and_Arctodus

 

https://www.researchgate.net/publication/298056854_Sexual_selection_on_skeletal_shape_in_Carnivora

 

https://www.proquest.com/openview/7dccbabe1ba3c6badb85120113dead5b/1?pq-origsite=gscholar&cbl=18750

 

 

Throughout this side by side comparison, we found out that the Brown Bear has a shoulder Hump with relatively more robust humeri,radii, broader distal ends larger epicondyles,olecrana and wider styloids while the Gorilla only has shorter forelimbs and thicker scapulae. If we factor in the Bear's claws, it's likely that Ursus Arctos would outgrapple Gorilla Beringei of similar size. Therefore, there's no question that a Gorilla wouldn't do much against a much Bigger Brown Bear.