Temporal lobe

Temporal lobe

• 3.
  Speech Speech is governedby the left temporal lobe of the brain. This lobe contains the language zone, Wernicke's area, which is a part of the brain that is responsible for controlling the mental processing necessary for speech. It controls the processes involved in comprehension and verbal memory.
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   Memory The hippocampus,which plays a crucial role in long term memory retention is located in the temporal lobe. It stores the essential components of memory, that you can recall consciously and describe. These memories can be anything like, facts, events, people and places. It plays an important role in retrieving information stored in the brain. It is an important function of temporal lobe.  Reading Reading comprehension and retention entirely depends on the temporal lobe. It processes the sounds and written words into meaningful information. The temporal lobe allows you to remember what you read and stores the information for you to recollect later.
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  Emotional Responses The amygdalae,located deep within the temporal lobes play an important role in processing memory of emotional responses. It enhances mood stability, and deflection in the activity of this lobe can cause fluctuating or unpredictable moods and behavior. The temporal lobe is also concerned with the expression of fear. Researchers say that the temporal lobes may be stimulated during spiritual or religious experiences, and those with temporal lobe epilepsy appear to be highly sensitive to extraordinary experiences. Auditory Responses A section in the temporal lobe known as the primary auditory cortex, is responsible for receiving and interpretation of information that is transmitted through the auditory responses. It responds to different sound frequencies and also helps in determining the location of a particular sound. Visual Processing The most advanced types of visual memory are processed and interpreted by the lower portions of the temporal lobe. Feelings of conviction and insight are also due to the temporal lobes. Olfactory Functions The olfactory lobe, which is responsible for identification and recognition of olfactory information is situated in the lower surface of the temporal lobe.
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  Blood supply Temporopolar: The arteryextends from the sphenoidal segment of the MCA via the operculum inferior surface and supplies the polar and anterior lateral portions of the temporal lobe. The vessel can be identified in 52% of normal angiograms Anterior temporal: This artery extends in the similar fashion and the temporopolar and vascularizes the same regions.
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  Middle temporal: This arteryextends from the Slyvian fissure opposite to the inferior frontal gyrus and supplies the superior and middle portion of the middle temporal lobe. It can be identified in 79% of angiograms. Posterior temporal: This artery extends out and away from the operculum and turns in a step-wise manner first inferiorly then posteriorly into the superior temporal sulcus than to the middle temporal sulcus. This vessel supplies the posterior portion of the temporal lobe and is the origin of several perforating arteries that irrigate the insula. It is readily identifiable in most radiograms
• 8.
  The first largebranch of the middle cerebral artery (MCA) is a large arterial trunk which supplies the entire temporal lobe by forming the temporopolar artery (TPA), anterior temporal artery (ATA), middle temporal artery (MTA), and posterior temporal artery (PTA). The lenticulostriate arteries (LSA) arise from the main middle cerebral trunk
• 9.
  Effect of stroke Disturbance of auditory sensation and perception.  Disturbance of selective attention of auditory and visual input.  Disorders of visual perception.  Impaired organisation and categorisation of verbal material.  Disturbance of language comprehension.  Impaired long-term memory.  Altered personality and affective behaviour.  Altered sexual behaviour.